Ex with kids

My boyfriend was in a relationship three years before we got together, for six years. His ex had two children when they got together, but do not have any together. He hasn't seen them much since they've been apart because her recent boyfriend refused to allow that. Now, she is single, and her and her children keep calling my boyfriend. She keeps threatening him because he doesn't call "his girls" anymore, and he feels horrible about it, and talks about the girls constantly. He talks of going to see them, and calls them every so often to tell them how much he loves them and misses them. Normally, I wouldn't mind this. However, I also have two children from a previous marriage, whose father is not in their lives. They call my boyfriend Daddy. They love him. But he treats his ex's children better than he treats mine. Her kids are 9 and 12. Mine are 6 and 2. They don't understand why "Daddy" talks about these other kids so much, and I've asked him not to around them, or around me for that matter, but he gets mad and says I should care about his ex's kids as well considering he looked at them as his own for 6 years. I just can't do that. Am I in the wrong here, or is he? I honestly don't know.

What a trouble! well madam,growin attraction to children is not a bad thing,but in your case wt i can clearly see is ur man is really fond of his Ex's kids n aftrall 6 yrz arent a small tym right.So you shd try to talk to him,is it only abt the kids he is concerned or dre mom too( ur Bf's ex)!! cuz if its abt dre mom 2,den dis is tym to say a goodbye to ur bf cuz he isnt still over his ex yet! else if its abt the kids only...try to be more relaxed,its jus about the lil bonding betn those children n him,m pretty sure your man loved your kids too,so dont force him to be partial,if he is a real man,he wil never make difference between both sets of kiddies! till den try to sit and talk abt His "real" attractions! do luck !