Thanks @mightysprite for that info. I haven't updated yet, so I haven't experienced these mean interactions, and I certainly don't want to. Plus, the way the game is programmed for jealousy, even when your significant other isn't the one who is initiating the flirt and actually rejects it, their partner will still get furious for being cheated on and relationship points will tank according to another simmer who tested it.
So with the new information you've linked to, that confirms my choice in not updating yet was a good choice to make