Me and my sister had boyfriends in high school. Once when our parents were gone for the weekend we had them over and we all had sex. At first we just had sex in seperate rooms but eventually we were having sex in the same room. The guys said it would be hot if me and my sister kissed so we did.

At first we just swapped boyfriends. Then the guys came on my face and my sister started kissing me again. I was so in the moment i started fingering her.

At one point my sister was eating me out while her bf fucked her and i sucked my boyfriend.

At the time i just thought we were horny teenagers but now i know it totally was incest. Its kinda hot knowing my sister has licked my pussy though. If i could do it again Id want to lick cum out of her pussy.