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resealableheart it will get easier as they get older. It does make it easier with an intermediary person if you have a person who would do that.
Your ex will probably be more interested in the baby as the baby gets older. Some men, not all and I know I'm being "sexist" but some men are not too good with babies and he probably believes he wouldn't cope with all three. I know that isn't fair and in an ideal world that wouldn't be the case but wasting time worrying about that only makes it worse.
Be glad he's out of your life as you dislike him so much, accept that he is incapable of doing the things you need and expect, focus on bringing up your children as best you can and enjoy it. They grow up so quick, he's the one who's missing out but for their sake when he does decide he can manage the baby be gracious about it rather than refusing because he's been rubbish.
When you let go of expectations and look on the positive side of life everything becomes easier and happier. He's out of your life for the most part and you have three beautiful children so rather than let him tarnish that by allowing him to affect your thoughts and get caught up in how he "should" be accept how he is, let it go and focus on you and your children.
Much luck and blessings
