Boyfriend talking to ex fiance

My boyfriend almost married this girl but broke up with her 2 months before the wedding and her parents had paid for everything all ready and I don't think got refunded for everything. I saw text messages between them. We are sharing a phone because mine is sitting in rice. I went through them and he messaged her first saying he wants to talk to her and she said okay and he said she owes him nothing but really needs to move on and needs closure. She said ok and he said pretty much that he feels like he's crazy because he feels the relationship was abusive and that she raped him but how she says it and everyone else says it they think it wasn't and he wants her to admit it wasn't consensual. She said she thinks it was so he goes into the night. He had said quite a few times that he didn't want a baby and she kept pushing it and he said they weren't ready. When she was riding him he said he's about to cum and she said do it inside me and he said no and tried to push her off and clawed his face with her nails and put all her wait on him and kept going. He asked her to get off again and she covered his mouth until he came. He said he felt raped and powerless and like his body betrayed him and she said he came there for it was not rape. He said he thinks it is because he said no and she said "Unless I fucked you in the ass I didn't rape you. I had your consent". Then he said he took the consent away and she said "You dick didn't go down. Your dick decides consent". It was a very long argument until I could see he obviously got emotional and said what she did was wrong and it hurt him and it makes it hard for him to be intimate with anyone. She said ok with an eye rolling emoji and then he blocked her. How would you feel about this and how would you approach it.

Edit: He does have a therapist but he got a promotion and since then has been rescheduling all his sessions and he hasn't seen him in a month.