Get proof so you can close the marriage quickly.

Hair-braiding is not the only thing she’s better at — if you know what I mean ;)

Sounds like it’s more than open, he has introduced your kid to her already

wonder if she braided it with divorce in mind

Perhaps it was a workmate and there's nothing shady?

While I’m not denying that he could be cheating, it’s possible she meant “girl friend” as in a female friend. She could also hear you or someone else talk about your female friends saying “girlfriends” (as women sometimes say) and picked it up from that. In the case that the benefit of the doubt isn’t true, sorry OP...

If she's that little of a kid this could mean a lot of different things. His "Girlfriend" could well be a hair stylist he goes to for all you know. It doesn't mean he's actually sleeping with someone else. Obviously this needs to be looked into further.

Well...at least it wasn’t his other wife...

Kids say the darndest things.

It’s one thing to be so much of a dick to cheat on your spouse but to bring your kids into the middle of it that’s just a true low life