beta
I can understand him being anxious about his first bf and they haven't been together for long, so i can kind of see his actions being how someone would react, buuutttt he really needs to sit down and talk to him. It's not like he will leave if you say you don't have experience with girls. I would say that's actually a good thing for the relationship.
Im married with 2 kids and even if someone comes up to me and says, "I slept with your husband." I'm going to believe my husband, first cause he is at work or at the house, his work only has guys and he is a boobie guy so yeah, second, we have clear and open conversations weekly even if we don't have anything to talk about. I always recommend to everyone to at least have a hour. Sit down, weekly with your significant, other to talk things out, and if you get mad, go in different rooms, calm down and then come back and talk. It has worked wonders in my relationship with my husband.