A few days later, I saw Toby coming over to visit my little sister.  She was waiting for him when he came in, and they went to her bedroom.  The door was open, and I saw them making out and fondling as I curiously walked by a few times.  The next time, I got "Hey, come here!" from my sister.  "Yeah?" "Just the answer I wanted to hear!" she said.  "Come here!"  I walked in and she said, "Get on the bed!" 

As I did, Toby pulled his penis out and undid his pants.  Then he pulled them off completely.  A nice looking black man, his balls were huge, like baseballs lying there between his legs.  His penis was soft, but I already knew how big it was!  Toby reached over and took my hand.  He led it to his balls, helping me to caress them.  "Take his penis in your mouth, before it gets hard, and deepthroat it." my sis said.  "It's a beautiful penis!" I said, not sure why.  I took it into my mouth.  I really did want to.  I let it slide down my throat without gagging.  I could feel it getting bigger.  He gently began to thrust it back and forth as it grew longer and longer.  Finally, it was too big, and I had to settle for sucking on the end of it.  "Kiss his balls!" was next.  I sucked gently on his balls, squeezing them, using two hands because they were so big and full.  "You're so full of cum, I can feel it." I said.  Then I said, "you may have to cum in a glass so that I can drink it all, and not spill any!"  In my excitement, I had let any inhibitions out.  "Great idea!" my sister said.  Toby then said, "There's going to be a party in the neighboring town, of all the football players - like probably 100 guys there, at a house-party.  I'm going to tell them that I know a guy that is willing to swallow 100 loads of cum, on video!  and clean off the cocks after each one!"  "He'll do it!" my sister exclaimed, clapping her hands!  Then she ran out of the room for a few seconds, only to come back with a small glass.  I licked and sucked Toby's cock head and squeezed his balls until he exclaimed that he was cumming.  My sister caught it all in the drinking glass, which had more in it than any of us imagined it would!  The 6oz glass looked at least half full of cum.  Then my sister went to the bathroom and finished filling it with water.  "Why did you do that?" I asked.  "Look, now you can see the semen and the sperm separate!  The semen will go down first, and then the thick, clumpy sperm last!  I want you to keep the sperm in your mouth for awhile and show it to me!" she giggled.  I followed orders, never having seen that trick before!  The thick sperm was quite a treat, and I rolled it around in my mouth for a few minutes before I swallowed it.  Toby got hard again, watching the antics, and I thought he would fuck my sister, as I watched him lube his cock with stolen lube from our parents bedroom.  Instead, he mounted me from behind!  My little sister grabbed her camera and took pics of Toby fucking my ass.  It felt so good!  Soon, I knew I was going to cum into the air as his cock penetrated me deeply.  Instead, my sis grabbed the drinking glass, caught all the cum, and made me drink it within a second or two of spurting it into the glass.  The hot thick cum was just what I needed as Toby finished balls-deep inside my ass.