Sorry but Uncle Marty NEVER called someone wife's a wh--- even in a joking manner. Plus it came out of nowhere from humble in an extremely ANGRY, not at all joking, manner. So no, not at all like Uncle Marty.
I didn’t see the thread/post, and have no idea of the context. If you were the target, then I assume, based on what I remember of the history between the two of you, that he was going for an extreme reaction. He got one.