Wow think it's odd him wanting to meet you. I did meet OW. That was because my H forces my kids to do everything with her, then posted a pic of the 2 of them on FB announcing their relationship I guess. I went nuts, said that's it, I want to meet her. Made me feel better that she isn't all that. Got to let her know I wasn't ok with any of this, that I do not want a divorce, he has hurt the kids and did walk out on us. Told her this is adultery. Now she can have that all in her head. She wants to continue it knowing all this, than that is on her.
I think he is threaten by something. What that is time will tell.