Now that I think about it more, most of the UBM's that I can recall were always the husbands.
There was a recurring pattern in my area with recent female converts with UBMs. They would often talk about their husbands as these terrible monsters who persecuted them for their faith, but almost in every case when you actually met these men they were very normal and even docile. You could see the embarrasment in some of these women's faces when their UBM attended meetings. Lots of these women (like a lot of JW converts) were mentally damaged and were looking for sympathy.
There was this one lady whose husband eventually became a witness. I remember on one occassion over lunch a few witnesses asked the husband how he could have been so cruel to his wife before he became a witness and he was dumbstruck. He didn't know his wife had been spreading these lies about him and she looked like she wanted to crawl under the table. He eventually became an elder. The one who actually ended up on the receiving end of the congregation's empathy was the husband because he was a stand up guy married to a crazy gossip.