So I have a fwb and we meet maybe like every two weeks or more often depending on our work schedules. I recently hooked up with another guy though and then a week later hooked up with my fwb. While we were fucking he asked me if I've been fucking anyone else. I would have felt like shit lying so I just told him the truth. He seemed a bit surprised at first and started asking me more questions about who it was and stuff (mind you we're still fucking, and of course he decides to purposely fuck me harder while I'm answering him and says stuff like "c'mon, just tell me who he is" jokingly. He's such a tease) anyways after that on the drive home he asked if I'd ever fuck one of his friends or if I'd ever fuck anyone that's ugly or if there was anyone in high school that I really wanted to fuck but didn't, idk he kept on asking all of these questions but I can't tell if he was jealous or not when I told him that I did fuck someone else. Any clues or signs to look out for?