A while back my sister had come into my room unannounced when I was butt naked and she saw my dick hard. We never have brought it up to each other until the other night. Her friend(Ashley) was over and they asked me if I wanted to watch a movie in the basement and I had no plans so I said okay. We are watching the movie and some dude texts my sister and I hear Ashley go “isn’t he the dude with the small dick”. They start talking about it and my sister had a pic of it cause she shows her friend and they start cracking up, then they show me for some reason and all I say it “damn that is small”. That’s when her friend say “it’s probably as big as yours” and before I could say anything my SISTER says “I accidentally walked in his room when he was naked and his giant dick his burned into my memory”. Ashley looks over at me and says “oh really haha”. We finish watching the movie and I hear them occasionally whispering to each other with random laugh outbursts but I just ignore it. Everyone has been drinking and we are all pretty drunk and decide to play some classic Wii sports. Ashley is definitely drunk as they are playing tennis and she is flopping all over the place and her pants start to sag and the thong she’s wearing starts popping out. My sister says she’s gonna go upstairs and make some pizza rolls and pee. I decide it’s a good idea to get more beer so I grab some from the fridge and Now it’s just me and Ashely. Ashley asks me to play tennis so I say okay. The whole time she keeps getting in front of me and brushing her ass against me like I don’t notice. She looks at me and says “wanna make a bet” so I say sure. “Loser of the next game has to strip naked”. I laugh about it and say okay sure and I easily beat her. She tries getting out of it by saying “it wasn’t fair, let’s do one more”. I say “ I’ll play again, but you have to get naked we agreed”. So she strips down into her thong and I just stare at her naked as I get hard and she looks down and sees it. I am now playing Wii sports tennis against a naked girl and I obviously lose on purpose this time. She looks right at me and says “time to take them off”. I dropped my sweatpants and out flies my dick that she stares right at. “Wow that’s the biggest dick I’ve ever seen”. I walk up to her grab her ass pull her in and start making out. We make it to the edge of the couch and I sit down and she drops to her knees and starts sucking my dick. Only a few minutes go by and she says it’s to thick and her Jaw is getting sore. So I tell her to sit on it instead and she rides my dick until I have to cum all over her. I go upstairs to check on my sister and she just says “you’re welcome” as if that’s what they were whispering about during the movie. “ I hate that I know how big your dick is now”. I just laugh and tell her not to think to hard about it. Is it weird that there’s a part of me that wants to walk in on my sister naked one time just to know what she looks like?