Another thought just crossed my mind, and I thought I'd play around a bit with that idea here. 

The idea mixes Magic spell TG with (step) family femdom.  And while I haven't worked out any details, seeing as how the idea just popped into my head a few minutes ago, I think I'd want it to be kind of like Cinderella. 

Lets start with 2 single parent families.  A mother and her son, and a father with his son.  The mothers son, lets call him Chris, wasn't what you'd call a manly man.  Probably because of the lack of a father figure in his life.  He was a shy kid with only a few close friends in school who preferred staying home with his mom over going out.  His mom, having to work to make a living, relied on her son to do stuff around the house, but to her suprise he seemed to enjoy it.  She would praise him for his exelent cooking, he would spend at least 1 hour a day keeping the house clean, the laundry was always done.  Chris' mom would gush over how clean the house was, how good the cooking was, and Chris Loved seeing the smile on her face whenever she'd come home from work.  But, there are some needs that a woman has that a son just can't satisfy.  So, durring the summer before Chris' senior year of highschool, His mother got married.

The man she married was, like her, a single parent with a son.  Lets call his son Garret.  Garret is 2 years younger than Chris.  His father made quite a bit of money working for a major corporation, and he probably spent more time working than he should.  When Garret was young he wanted nothing more than to gain the approval of his dad, but as time went on... after numerous failed attempts... Garret gave up.  Having money, Garret was never in need of much of anything, or at least not for any legnthy periods of time.  Whatever he wanted, he got.  He had friends at school, but he didn't really have any close friends.  He had something of a paranioa that all his friends were only out for his money, and this created an emotional wall between him and his friends.  He was a runningback on the football team, but he was only really mediocre at it.  Rumor around the school was that the only reason he saw any game time at all was because his dad offered the team substantial financial donations.

So, after the beautiful June wedding, the two families joined together under one roof.  Garrets father had a house big enough for four, so Chris and his mom ended up moving in with garret and his dad.  This required Chris to change schools, and distanced him from what few close friends he had.  The new house was quite a bit bigger than the one Chris used to live in, and as a result Chris needed to sacrifice more of his time to keep it clean and the laundry nearly doubled in size.  But Chris still did all of this with a smile on his face, anxiously waiting for his mother to come home from work and to see her smile.  But his mother, after the wedding, seemed to grow more distant.  With two more men in her life, she was no longer able to give Chris the same amount of undivided attention that she had in the past.  So Chris, instead of giving up, decided to up his game in order to "win back" his mothers attention.  Chris' enthusiasm for what garret called "Womens Work" caused Garret to give Chris a hard time at home.  He always got a laugh out of the pink apron that Chris wore while cooking.  It was a gift from his mother, but to garret it was a girly thing to wear while doing womens work.  Chris also wore a white apron while cleaning... with pockets to hold his dust rags and cleaning solution and so on.  But to Garret it looked a lot like a cleaning maids apron... and he had no problems telling Chris as such whenever he was cleaning. 

On top of this, Garrets father was getting on Chris' case over getting a job.  He felt that Chris wasn't contributing anything to society, and being a man, it was Chris's obligation to contribute to society by getting one.  It's also possible that he was worried about Chris' feminine tendencies.  Maybe he felt that if Chris were to get a real job, the the feminine tendencies he had would slowly diminish.  Regardless, as summer vacation drew to a close chris still didn't have a job and his new father was getting rather angry with him over it.  When Chris had free time he would walk around the mall to blow off steam.  He didn't have any money, but seeing everyone scurrying around to all the different shops seemed to help relax him.  He liked that he could be so "invisible" while in the center of so many people.  Anyways, while walking he comes across a small kiosk set up in the center of the isle.  It stands out because it's surrounded by a black tarp... like a tent.  It makes the kiosk look like it's closed, except that there is a faint light coming from the entrance to this tent.  as well as an open sign on a stand in front.  Curious he walks inside.  The inside of the tent looks significantly larger from the inside then it did from the outside, and there were no goods on display anywhere.  Instead there was an empty counter.  Behind the counter stood what looked like an old woman wraped up in a knitted black shawl.  She seemed thin and somewhat bony, but in the poor light it's tough to know.  All Chris could see was her pale wrinkled face.. Wrinkled, but still attractive.  Before Chris could say a single word, the old woman puts her finger up to silence him.  Without saying a word she stares into Chris' eyes for what seemed like an eternity.  A smile slowly creeps across her face.  "I've got something here that might interest you."  With that she reaches beneath the counter and pulls out a tray with three envelopes on it.  Each envelope has something writen on it, but in the poor light he can't tell what they say.  Picking up the one on the left to try and get a better look at the writing, the old lady quickly takes the two other envelopes away.  "Nice choice, young man.  That spell is designed to turn any man into a woman... temporarliy..."  With that an idea hatched itself in Chris' mind.  Interupting the woman from her explanation, he confesses that he has no money.  But the woman just smiles at him.  "Take it.  And I'll drop by to pick up a payment later." 

Chris's plan, in a nutshell, was to use the spell to turn himself into a girl.  Then he would get himself, or herself, a job as a maid for his new family.  He would go home, then right away head off for work.  Then he would transform into a girl and go back to the house as a maid.  This way he could still do the stuff around the house that he had learned to enjoy doing.  Chris will have a job, getting his step-father off of his back, and Garret would stop giving him a hard time.  Truth be told it probably wasn't a very well thought out plan, but truth be told Chris had been secretly wishing to be a girl for years, and now that the opportunity had presented itself he just had to try it. 

Unfortunately, in Chris' exitement, he had made to mistakes.  He interupted the woman as she was trying to explain the spell, and he didn't read the printed label on the envelope.  If he had, he would have realized that the spell had some stipulations.  This particular spell was designed to be used by a dominant person on someone else.  Yes, it turns a man into a woman.  But if this new woman get's even the smallest amount af a mans semen into her body whether by mouth, or vagina, or anus, or even nose and ear if need be, then she will be forced to comply to the every comand of that man.  The woman, upon hearing a command from a man who's semen she had somehow injested, will feel headaches, and cramps, and butterflies which will escalate in severity untill the woman carries out the command.  The body swaping can be controled by the person who chanted the spell, but the mental effects hold for roughly a week regardless of what gender the recipient of the spell is at the time.  This way, a person can't get away from their new master just by changing their gender back.  Plus, even though the mental aspect of this spell wears off after roughly a week, the time gets reset each time a "cum deposit" is made.  So, the mental conditioning will last as long as the man wants it to, as long as he makes sure to cum inside her at least once a week.

At first Chris' plan works out the way he planed.  His father was no longer angry with him for not having a job, and Garret Stoped making fun of him... and he even started making advances on him.  Something Chris hadn't origionally considered.  Chris didn't like Garret.  Wich isn't too suprising considering all the bullying and teasing he got before.  So, now that Garret was showing an interest, Chris loved teasing him while working while denying his every advance.  But, revenge is a double edged sword, and with Chris and Garret living together it was only a matter of time before garret would become suspicious.  No body really knew what kind of job Chris had.  He left the house every day just after returning from school and wouldn't come back till late at night.  To get some answers, garret started rummaging around in Chris' room.  There he finds the envelope stashed under his bed.  While a spell that changes genders seems rather far fetched, it did seem to explain a lot.  So, to confirm his suspicions, garret tails Chris after he leaves the house.  And, sure enough, he catches Chris in the act.  Chris had entered a unisex restroom at wallmart, and the house maid left a few minutes later.  Garret was appauled.  He had spent the last 2 months hitting on the maid, and now he realises that the very same maid was in fact his step-brother.  But, the envelope in his hand explaining the spell used gave him the perfect opportunity to get his revenge.

Just a couple of days later, Garret and the maid were alone in the house.  Chris' mother had to stay late at work, and Garret's dad was away on business.  Garrett went to his room and masturbated onto a handkerchief.  Sneaking back downstairs he sees the maid getting ready to cook supper, spagetti.  Quietly entering the kitchen Garret pinches the Maid's butt.  But, as soon as she opens her mouth to repremand him Garret quickly shoves the hankerchief into her mouth.  That's all it took.  Garrets cum entered Chris' body via the handkerchief in his mouth.  Garret holds the rag firmly in Chris' mouth for a few more second, just to make sure, before taking it out if Chris's mouth.

"What are you doing !!??!!  What was on that rag?"

Now it was the time to test his theory.  Garret looks at chris with a disconcerting smile... "Take that pot of spagetti off the stove, put it on the floor, and urinate in it."

"What's gotten into you?!?  There's no way I'm... ..."  In the time it took Chris to utter these words His headache had been getting worse and worse... "... Agh.  What did you do to me!!!"

Garret then shows Chris the envelope.  "Did you even read this thing before you used it?  Well, lets just say that the sooner you urinate into that pot, the sooner your headache will go away.  And once your finished with that I think we're going to have a talk about how things are going to change around here."

Garret's control over Chris lasts for months.  There are so many story's that could be told of all the humiliating and demeaning things He made Chris do, but I need to get to the end of my thought.  so I'm fast forwarding a bit.

One day after school the doorbell rang at Garret's and Chris' house.  Garret went to the door where he saw a thin old lady dressed in black standing at the door.  Before Garret can say anything, the old woman pushes past him and into the house.  She stops 2 feet into the doorway.  In the living room, on the floor, are two football players spitroasting a young girl of about 18.  The young girls eyes lock with the old womans, and the girl imediately recognizes her.  In her current predicament she cant move or talk.  All she can do is plead as fervfently as she can with the old woman using only her eyes.  After a rather legnthy staring contest, a smile creeps across the old womans face.  Seeing this, garret starts to grin too.  "If you want, you can join us.  She is very submissive.  I can pretty much garuntee that I can make her do whatever you want."

The old woman never breaks eye contact with the girl  "Thanks, but no thanks.  I'll have to take a raincheck.  Things to do, money to collect, you know... that sort of thing"  and with that the old lady left.

Roughly 2 weeks later Chris takes notice of a young girl in his class.  She has long, straight raven black hair and is wearing mostly black.  She isn't the kind of girl who stands out in a crowd, but Chris doesn't remember ever seeing her before.  With only a month till graduation it's hard to believe that she's a new student though.  But, Chris can't help but admiring this girl.  The girl approaches him durring lunch, and the two of them hit it off right away.  But, because of Chris' "situation at home" the two of them can only meet at school.

Then, for one weekend, garret leaves to go on a school trip, giving Chris a weekend free of Garrent demands.  Of course, garret gives Chris a command to follow for the weekend.  Chris was commanded to stay male, but he's only aloud to wear womens clothing.  To make the best of it, Chris decided to dress up in his maid outfit and start cleaning.  After a while, though, a knock came at the door.  Dressed as he was, Chris had no intention of opening it, but that didn't matter.  The door opened, and standing there in the doorway was the girl from school.  She takes one step into the house and stares right at Chris, a smile on her face.  After a couple minutes of akward, embarassed silence The girl speaks up.  "So, can I come in?"

"Ohh... um.  Of course.  Make yourself at home."  The girl walks into the living room and sits on the love seat.  After another minute of akward silence, the girl lets out a small quiet chuckle.  "Come.  Sit.  I won't bite."  As soon as Chris sat on the love seat next to the girl he crushed on in school, everything came out all at once.  He talked about his mother, and how happy he was, and how everything changed when his mother got married.  He talked about his step brother, and about the weird shop in the mall, and how the spell had backfired on him.  When he was finished, the girl reassuringly puts her hand on his thigh and kisses him on the cheek. 

"Most spells have something of a failsafe built into them.  If you still know where the origional envelope is, let me see it and maybe we can come up with a way of reversing the effects."  Upon reading the envelope, the girl smiles.  "Ah yes.  Luckilly this spell is an easy one to reverse.  Just trust me."  With that, she helps him out of the chair and stands him up in the middle of the living room.  Chris had decided to not wear any underwear under the maids outfit.  So the girl, lifting up the skirt of the uniform, gives Chris his first blowjob.  The girl wrapped her lips tightly around the shaft of his penis as he was cumming, taking the entire load in her mouth.  When she stands up, she smiles serenely as she goes in for the kiss.  While kissing she slips the cum from her mouth into his.  When the two of them finally go up for air, the girl laughs sweetly.  "There, it's done.  The spell has been negated.  The recipient of the spell is compelled to obey the orders of any man who's sperm they injest.  So, if you were to injest your own sperm, then you will be compelled to obey your own orders to yourself.  And order that conflicts with your own order gets negated, canceling the effects of the spell."

"With that done, how about you and I leave this joint and head back to my place... but first you may want to "command" yourself to change your clothes.  I don't think you want to be seen in public dressed like that... ... or would you?"

And the last scene of the story is of the young girl in the black hair taking down the shady stand in the mall and packing it all up