I honestly still can’t believe this happened.
For some quick background info I am 24m, I am 6’1” 225. I played college football so I am in pretty good shape (just d2 nothing special) I have blonde hair and blue eyes. I am in law school. My gf is 24f (let’s just call her Mia) is an elementary school teacher. She is 5’5” and probably 130lbs. She has brown hair and green eyes. She is very attractive. And my gf sister is 18f (let’s just call her Ava) she is a freshman at my college and is studying criminal justice to be a lawyer. She is 5’2” with blond hair and blue eyes. Idk how much she weighs but not much. She is very very attractive. My gf is extremely hot but she is on another planet. To get a good image of what Ava looks like look up young Kristen bell. Not that Kristen isn’t hot now but Ava is only 18 and honestly looks maybe a bit younger.
Ok onto the story now. One more piece of quick information me and Mia have been dating for about five years now so we know each other‘s families and everyone very well. So basically how this all happened is probably about once or twice a week. Ava will ask me for help with schoolwork just because she’s taking a lot of hard classes and I’ve already took them all and we go to the same college even though I’m in the law school part of it, but I’ve taken all the criminal justice classes that she is taking. Me and Mia have been able to afford a nice apartment really close to campus and really close to her job and Ava has a key so she’s always welcome and up until now our relationship was purely platonic, no sexual energy ever on my part but being honest, I could kind of tell that for the past few years, she’s had a slight crush on me. This also last week when Ava came over and she was wearing a skirt which I didn’t really think anything of until she dropped her pencil and bent over and I saw that she was wearing a thong underneath and for some reason it just really got me going. I think she noticed me looking at her cause she kind of gave me a smirk but for that night that was it that was all that happened. But then a few nights later, Ava came over when she knew that Mia was gone for the weekend to a concert with some of her friends and Ava again was wearing a skirt, but this time it was even shorter and she was wearing a sports bra with a coat over it. It’s the end of spring here in spring isn’t really that warm, but it was a pretty warm day so obviously she ended up taking off her jacket. I think she could tell again that I was looking at her because she started touching me on my leg on my shoulder which usually she never did before that much or if she did, I stopped it right away. Then a few minutes later she “accidentally” chapter pencil again, and bent over in front of me and she wasn’t wearing any panties so I saw her pussy. Instantly that got me super turned on and I tried to stop it, but I couldn’t and she ended up pulling my pants down. She started sucking my dick and it felt so much better than Mia has ever done so I just let it happen. Then she got dressed in front of me and it was the hottest thing ever. She is so hot and I’m just gonna say it, I fucked her. I fucked her hard. Ever since then whenever we get the opportunity, we sneak away and hook up. I know it’s horrible but I can’t stop she is so damn hot.