Nosy mother in law

My boyfriends mother just asked my boyfriend to see his penis...

The story goes that when he was a baby his penis had a bend in it and they had to have surgery to fix it way back then.

Literally every time we have dinner with her she asks him if his penis is alright.

And we were just FaceTiming and she fucking asked to see it. I was in the room and he told her his penis is fine and to stop asking about it. But then she asked me what it looked like.

I’ve never encountered something like this but I’m taken back how inappropriate she is being and I have no idea what to do, but my boyfriend said this is “normal” for his mum. Some things are just off limits and I consider this one of them.

Any advice PLEASE?!

Edit/update: thanks for your advice! I spoke to my bf and he agrees it’s odd but once again said “it’s normal for her, she does weird things”. I told him I don’t want her asking about his penis anymore, but he said he’s told her before to stop asking Inappropriate questions and she just won’t. So I basically got no where. Any other advice? I’m building up the courage to be blunt to her next time we talk and tell her myself to stop the behaviour.