I'm 22 now but ever since I was about 17, I've had fantasies of fucking my sister who is 4 years younger than I am. She's was a hot piece of ass when she was 13 and now at 18, her body and the way she handles it just got hotter.

In the last month or so, she's starting walking around in Bra and Panties, at least when Dad's not home. Mom has told her several times that's not very lady like but my sisters reply is "no one can see anything Mom and it's only you and Anthony home. (Anthony is not my real name)

Now if Dad was home, she wouldn't be strutting her stuff like she does, not because Dad would give her a really hard time about it, although he probably would. She doesn't walk around in her Bra and Panties when Dad's home because in her own words, it wouldn't be right for Dad to see her dressed or undressed that way. The Daddy/daughter sexual tension thing doesn't seem to be an issue here.

So, why does she walk around like that when I'm around but not when Dad's around and yes, she does this when no one else but her and I are home. She flirts playfully with me but both of us have done that since we first hit our teens, nothing has ever come of it. She's rubbed my shoulders after I come home from hockey or football practice or a work out from the Gym and it's a very enjoyable rub, I mean "very enjoyable" as in more sensual than practical. I've had to hide a hard on several times.

Have things changed for her? Is she coming on to me and if so, why can't I see it? I'm 22 years old and far from stupid. Maybe I'm just not seeing things or in some sort of denial. Fuck, it's what I've wanted for a several years already She's got a fantastic body and could have pretty much any guy she wanted. I guess that's why she's really picky who she dates, she's got her pick

Am I just being stupid and missing a good thing? Should I be a little more obvious in my desires?