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bluelonelyheart Then this is also something you need to discuss with him, just lay it all out on the table and if you need to press the issue then tell him it's not acceptable for that behaviour when you're in a 2 way relationship, it's in the child's best interest.
Just stay calm, and if he doesn't want to listen you're going to have to tell him he's going to have to, no other way about it.
If he's unwilling to change and is disrespectful then the rest is up to you but be assertive. Like if he walks away and makes a joke then you say "No no no no, this isn't about you, sit down and talk to me" like a mother would to a child almost, so not aggressive but you need to learn to assert yourself. I'm afraid he's going to have to be a responsible person in this case and part of that is listening to the mother of his child.