Awkward situation

My bro in law is dating a much younger girl. He’s 44 and she is 26. She’s married and has no kids but wants kids.

She lives in another city and goes to visit her mom in the city that my bro in law lives in. When she’s “visiting her mother” she hooks up with my bro in law. She says she wants to divorce her husband but seems to struggle pulling the trigger. Her husband wears a condom so she won’t get pregnant but my bro in law does not and he’s trying to get her pregnant and she doesn’t care. It’s trashy af.

I’m close to my bro in law because we have some of the same interests. He’s gone through some horrible experiences that I won’t mention. He’s also divorced. I just can’t get onboard with this situation he’s in. He says the sex is just incredible and since his divorce he’s had so much pain that he doesn’t care how wrong it all is. He literally craves the sex.

Then there’s the situation with my wife (no pics) not knowing anything and it’s all so awkward. She would flip out if she knew.
He even started texting me pics of this chick naked and doing all sorts of stuff that’s kinky. I hate to look at it but I can’t look away. I look and then delete but I’m starting to look forward to the Friday night “show”. This girl is really hot.

Anyway, I figured the OT would appreciate the struggle.