OT but this is awkward.

I am at a 4th of July gathering and one of my married male friends (whose wife is here) is shamelessly flirting with an also married female friend (whose husband isn’t here) of the host. He’s doing this while his wife is but a few feet away. Either he doesn’t realize how this is looking or he doesn’t care. You’d think our obvious unease at the moment would tip him off.