Okay so first, if you’re calling him your “babyfather” and not your boyfriend or partner, that tells me you two might not even be in a committed relationship. Which makes this complicated because technically he’s allowed to see other people. But sleeping with your friend is still a betrayal of trust and friendship, even if you’re not officially together.
What’s making you suspicious? Have you seen actual evidence or is it just a feeling? If your friend is suddenly acting weird around you, or if she knows things about him she shouldn’t know, or if they’re always texting or hanging out without you, those are signs. But don’t accuse without proof because that can backfire.
You need to protect your peace for the sake of your baby. Drama and stress aren’t good for you right now, especially if you’re pregnant or dealing with a newborn. If you can’t trust the father of your child or your so-called friend, maybe you need to distance yourself from both of them and focus on your baby.
And let’s be real, a friend who would sleep with your baby’s father is not your friend. That’s someone who doesn’t respect you or your friendship at all. You can do bad all by yourself, you don’t need people like that in your life. Sometimes the universe shows you who people really are and you just have to believe them.