Younger Sister Turns Out To Be A Slut

I’m 24 and my sister is 18. I found out she smoked weed last year and me and her began to smoke weed sometimes since I smoke sometimes too. Well I’m back in town this week cause of Christmas and I suggest we smoke but she tells me she’s all out so she’ll have to hit up her guy. I drive us to his spot and my sister asks me to move to the back seat and I ask why and she tells me she has to do something for him. I’m really confused and I ask more but don’t get a real answer and finally just agree. The guy comes and she tells him to get in the front seat I was in. She then pulls down his pants and starts grabbing his dick. He gets hard and is pretty hung and she grabs it with both hands and just starts sucking on it. I was totally shocked that I was just sitting there watching my little sister suck some big ass dick. Even more, this guy nuts in her mouth and she swallows and licks his dick clean. After he leaves she looked at me and said that’s what she had to do for him and she’s been doing it ever since she got into weed. My shock wore down a bit and I remember she has a boyfriend and I ask her about how he feels about her sucking other dicks. She told me he doesn’t know and it’s none of his business. I would lie and say I’m not turned on by it but I am.