"This child feels like a closure you're not ready for, a constant reminder, and a sign that he has moved on," wrote user nebulousrealist. "That's real [expletive], and HARD. You deserve to process this, and, you can be honest with your boys and say that you are happy for them and their excitement, but that you're processing some big feelings about it, and maybe you can put a 'if you want to talk about baby, do it over dinner, then focus on you guys.' (Just an example).
"It just strikes me that you feel you can't say shut up (kudos) but you can have some boundaries when this topic comes up. You deserve peace and you deserve to not feel consumed by your ex's new family.
"You may feel left behind and abandoned right now, and you deserve to reconnect or even connect with things you find meaningful. You deserve a happy and fulfilling life."