You still don’t trust him. How did he react when you said you hope he didn’t develop crush on her? What if she was pretty AND thin? Is the only reason he won’t develop crush on women is their weight, what if they lose weight?

You just don’t trust him around women. What does your individual therapist say if you discussed it? It sounds stressful to worry about this stuff. I hope couples therapists reply to you soon. There has to be trust for marriage to work and maybe there are ways to build it.