This happened with my ex girlfriend. The relationship was intense, we were barely legal, horny AF and clueless. We never used condom and I would always pull out. We fucked at my house, hotels rooms, even in empty classrooms and didn’t think about consequences.
One day, I got to know she’s been cheating on me with 2 other guys. I was sad, and frustrated but didn’t know what to do. I called her over, and ended up screwing her one last time. I knew I had to end things and fucked her like there’s no tomorrow and came inside her. She asked me not to worry and that she’ll take morning after pills. I told her I knew she was cheating on me and broke up then and there.
Fast forward 3 months, I hear from my friend that my ex got pregnant and had to abort a few weeks back.
She could’ve been pregnant with anyone out of the 3 guys she was sleeping with including me. So, mathematically, there’s a good 33.33% chances that was mine.