Babyfather has his eyes on my friend
Guys are so gross sometimes, seriously. He’s supposed to be focusing on you and your baby, not trying to hit on your friends. That is such a betrayal, and it shows he has absolutely zero respect for you. If my best friend’s boyfriend looked at me like that, I would tell her immediately because that’s what friends are supposed to do.
You need to talk to your friend and see what her vibe is. If she’s encouraging it or flirting back, then she’s not a real friend and you need to drop her immediately. If she’s grossed out by it, then you guys can team up and tell him to back off. Either way, your babyfather is showing you exactly who he is, and it’s not a good look.
Honestly, you should probably just distance yourself from him altogether. If he’s scouting your friends, he’s not committed to you or your family. Keep him at arm’s length, co-parent if you have to, but don’t let him play these weird games with your social life. You deserve loyalty, not a guy who acts like a dog off a leash.