He knew what I wanted and started licking and probing my pussy with his tongue. I pinched my nipples and squeezed my breast as he sucked my clit and f...ngered me to a very hard orgasm. He laid his head on my stomach as I stroked his head and we just relaxed for a bit. His 15 minute filter swap lasted a good 45 minutes. He stood up and pulled up his pants and collected his shirt while I went to the kitchen to get some water. I gave him a long goodbye kiss and he sucked on each nipple before. ..well, I'm just not sure about that..."I heard my sister grin into the phone. "I'll let you stick it up my ass. Do you think little miss 'double-date' will let you do that on the first night?" Maybe," I said."That's too bad. See, somehow I've managed to tie myself to your bed, and my ass is all smeared in lube. I dunno what mom and dad are gonna think when they get home..."I excused myself from the table by saying there was a family emergency (wasn't there?) and raced home on the 101. My. I turned the corner and there was another theater with a gay threesome on the screen I stood in the doorway for a second then sat on the first couch. I was getting aroused watching the guy suck cock and take it in the ass he seemed to really enjoy it. I noticed someone coming in the door so I looked down to try and keep from being noticed. As they walked by it was Brad and another guy from the party they sat near the front and within no time the other guy's head was in Brads lap. I was. I don’t remember taking that last step towards her, nor her slipping my shorts down exposing my raging cock. I had my eyes closed and felt a hand being placed on my cock as i stood naked in front of sister. She let her hand slide lightly along the full lengths of my throbbing cock and back again. “my, you sure have grown since the last time i saw you naked. Your already bigger and you still have more growing to do. You’re going to make some woman very happy.” I opened my eyes just as my sister.