I wanted to know what was going on so I returned to my room and slammed the door walking back down stairs. My sister did remarkably well to get into h... panties by the time I got to the bottom of the stairs she was looking very embarrassed when I asked what she was doing. She was clearly surprised to see me and obviously thought I was at school and she had the place to her self. When I asked her what she was doing she just told me she was exercising and disappeared into the bathroom. We never. I didn't look at it right away but the sheer size of the object in my hands drew my eyes to it. I pulled back from his lips and went down to my knees where I was face to face with a 10-inch long thick monster cock that I immediately started to taste, licking and kissing every inch and spot.Before long I had the urge to have it in my mouth and I began the trek to take him all in. I started slow, letting my juices build to coat my prize. I came back up every few bobs to lick a new pool of pre-cum. How long ago did you plan this? We didn’t manipulate you into taking us, did we?”I laugh, “What makes you say that?”“You little bugger. You manipulated us into asking you to the prom, didn’t you?”“I plead the 5th.”“This isn’t the States, smart-ass.”I swat her on the ass and say, “If you want enough energy for our date tomorrow, you best get to bed.”She gives me one last quick kiss and heads to her room. I take a shower, after which I leave an envelope for Kim, taped to my door. Kim is the one. Yes she replied and I slap her cunt. I rubbed harder up and down on her puss as I asked again do you like sucking my cock and this time as she reached climax and started orgasmning during her loud moans as I rubbed her puss harder she answered yes my babe I do. I let her finish her orgasm and then I slapped her cunt twice and asked yes you do what? I asked her. Yes I do enjoy sucking your cock baby she replied and I rubbed her clit harder as she moaned louder and her body started to tremble as.