So, FWH's sister had a birthday party for her youngest yesterday. I thought it was just family but she had friends there, including a neighbor and her baby. Part way through, she commented on the coffee mug my FWH was using. SIL collects coffee mugs, and apparently this was "her" mug when she comes over. It was in the cupboard and FWH just happened to pick it. There was some back and forth, but FWH did not engage in anything inappropriate, even though I felt this woman was tring to get him to flirt.
She left before we did and we helped clean up. FWH said to his SIL, "I put K's mug back in the cupboard." No biggie. Well, SIL gets out her phone and texts this woman "FWH says...." Then, there was a whole text exchange between them "no thanks, it's tainted now." "My brother isn't diseased" etc. FWH did not get involved, but it made me feel uncomfortable. His sister is getting divorced from the OM from her first marriage, and has had several inappropriate relationships. She has no boundaries, and while I consider her a friend of the marriage, in that I don't think she would deliberately do anything to hurt our M, I am concerned. She likes to drop by our place for coffee unannounced since FWH works from home, and I have this fear that she will show up with this woman sometime. I can see her talking up FWH to this woman.
She doesn't know about the A, and I don't really want her to. I think if she or MIL knew we would be gossip fodder for the whole extended family. I shared my worry with FWH who said if they showed up he would tell her he couldn't stop for coffee. He is empathetic and sorry that he put us in this position, but we are here.
It may never happen, but if it does, what to do? I feel like I'm worrying for nothing but I get a bad feeling about this woman and it is something I can see his sister doing.