I [M24] slept with one of my Ex GF’s best friends [F23] [MF]

In college, my ex-girlfriend was very good friends with a girl named Katie. The three of us would often hang out and go to parties together. My ex was much more sociable than me and Katie, so she would usually leave us together at a party to check in with her other friends. As a result, me and Katie spent a lot of time chatting and actually became pretty close friends. After we graduated, however, I saw a lot less of her and our interactions became limited to social media comments.

When my ex-girlfriend and I broke up a couple of months ago, I heard even less about/from Katie. She is from another state so I was shocked when I saw her on Bumble last week. I was even more shocked when we matched, given that she is still very close with my ex. I learned that Katie had just moved to NYC and is planning to attend law school at the end of the summer. She asked if we could get dinner and catch up, and while she insisted that it would just be purely platonic, she also mentioned she wasn't going to tell my ex. This made my mind start to wonder. 

I always thought Katie was good-looking, but I genuinely never saw her in a sexual manner during my relationship. Now, I was thinking why she wanted to keep our date private. Even though we were both single, it started feeling like something we shouldn't be doing, and that only made the thought of it hotter. Physically, Katie is about 5'5" with shoulder-length brown hair. She has really pale, white skin and gray eyes. She is thin, but dresses in a way that really accentuates her body. To give a facial comparison, I think she looks similar to Gracie Abrams.

I got to the restaurant earlier than Katie, and I was blown away when she walked in. She was wearing knee-high leather boots, a black skirt, and a light-blue top that showed off her tight stomach. I stood up to hug her and say hello, and instead of sitting down across from me, she pushed into the booth next to me. She was immediately flirtatious. She pressed her knee against my leg and at some point, her hand landed on my thigh and stayed there. By the time I had paid the bill, I was incredibly turned on by her.

I offered to walk Katie back to her apartment and she enthusiastically accepted. She held my hand, and when I teased her about our less-than-platonic dinner, she giggled and told me to shut up. When we got to her building, Katie shot me a devilish smile and said, "I really shouldn't be doing this." She invited me up.

As soon as the door shut behind us, I pushed her up against the wall and we began making out. Our hands were exploring each other's bodies and I could feel myself getting hard. I reached my hand under her skirt and broke our kiss to whisper in her ear. "I know we shouldn't be doing this, but can I?" She shook her head yes and I started rubbing her clit. It was so hot having Katie moan into my mouth.

After a few minutes of kissing against the wall, Katie grabbed me by the wrist and brought me to her bedroom. "I need to feel that cock" she moaned. She pushed me back onto her bed and undid my belt. I was already throbbing hard for her. She straddled me and went to put my raw cock inside of her. I told her to wait, mentioning the condom I had in my pocket. Katie looked at me with her deep gray eyes and said, "I thought this was a night for doing the stuff we aren't supposed to." I grabbed her ass and pulled her closer as she slid herself down on my cock.

I would love to say that I lasted a long time because this felt amazing, but Katie was riding me like she was on a mission. She was taking me deep and hard, moaning the dirtiest things about fucking me behind my ex's back. I told her I was getting close and she told me hold on. I had to make her come first. She dug her nails into my chest and threw her head back. She was using my cock like a toy.

Before long, I could feel her pussy start clenching around my cock. She cried out as she came for me, and then gave me permission to cum. I grabbed her hips, thinking she would want me to pull out, and she told me to fill her. I didn't hesitate. I erupted inside of Katie, shaking slightly as I bit down on her lip. 

We laid together like that for a few minutes before Katie sat up. It was at that point that she informed me she was on birth control (still risky). We put on a movie then and I stayed the night at her apartment. We have had a couple more "platonic" dates over the past week.