Cheated on my ex with a high school classmate

Idk how this one happened but here's another older confession. To cut out a lot of fluff my ex was staying with me at the time and she was asleep in my bed. I was upl playing some games and I get a Facebook message from my old classmate saying she's in town and wants to know if I'm free to hang out( she message me at like 1am) and I was like sure. So she came over middle of the night and we just sat and hung out in the living room. By the way she had a major crush on me since high school so I kind of used that to see how good of a fuck she'd be. As we're chilling and catching up I tell her to sit on my lap and she's kind of shocked but she does it anyway. I was already rock hard so she immediately felt my hard cock on her ass. She stated grinding while I was grabbing her tits and next thing I know we're taking off our clothes and kissing on the sofa. At that point she's telling me how much she wants me and how much she's wanted to have sex with me so I grant her wish. I tell her to sit on it and mannnn when I tell you her pussy is so damn wet I almost cum in her immediately but she rides for a bit and then we transition to the kitchen and the door to my bedroom is wide open but my girl is knocked out and so I tell her to keep quiet cause my gf is asleep. So I start fucking her harder trying to get her to make a noise but she holds her moans in and I end up cumming on her ass and we kiss one last time before she heads out and thanks me for the fun time.