Husbands coworker...

So my husband came home last night and said he had something interesting to tell me. Well apparently a female coworker has a crush on him and she brought up the idea of a threesome to him. Now I’ve never met this coworker before and I’m curious if she brought it up just so she could sleep with my husband.

I’m not against a threesome but my husband knows it would be a thing that we would have to discuss in length. I also would have rules if this were to play out.

What do you think?