When I got married in my mid-20s in 1988 in New England, I fell in with and began socializing with 5 other young married couples in a very large condo development--we found we had more in common with each other than our single friends.
One of the women in our group was a beautful blonde woman named Denise, who had a daughter who was just starting 1st grade. Denise was our age or even a couple years younger, and had only been married for two years. So we all did the math in our heads, and realized that:
1. Denise had obviously had her daughter with a man other than her current husband, and
2. Denise herself had been very young, still in high school, when she had her daughter.
Denise was very private about the details, claiming she wanted to explain the circumstances of her daughter's birth directly to her when her daughter was old enough to understand.
So the rest of us decided to not press Denise about the background of her youthful (and at least somewhat embarrassing) pregnancy.
Except for one of the women in the group, Amy, who did not like Denise at all. She would poke and prod Denise all the time for more detail about high school boyfriends, which Denise would dodge and deflect. Some of Amy's zingers were somewhat funny, but at other times she was clearly acting like an ass, and was being toxic to the delicate chemistry our group had going. None of us wanted to have to revert to hanging out with our pathetic single friends.
Well, one day, Denise is grocery shopping, and this lonely-but-creepy elderly guy starts stalking her. Denise had lots of stuff she needed to buy, so leaving the store wasn't an option, and was figuring out how to ditch the guy. She told him she was married, but he didn't believe her. Well, as luck would have it, Amy's husband bumps into them. Denise goes, "Oh, look at that! Here's my husband now. Hi, honey!", and plants a flamboyant wet tongue kiss on his mouth. Then another. The old guy gets the message and backs off. And then Denise explains to Amy's husband why the kiss happened. He says he was happy to help, but please don't tell Amy.
A couple nights later, the 12 of us are together, and Denise tells us all the grocery store story, and thanks Amy "for letting me use your husband..... for kissing."
Amy was beside herself, and told Denise that if the two of them (Amy and Denise) were ever alone, Amy would tear Denise apart. We don't know if they ever went at it, as the group broke up later when three of us couples moved. But many of us speculated about the outcome of their showdown if it had happned. About half of us were Team Amy, the other half Team Denise.