How long before he comes running back

Lisa
Hi ladies 
UPDATE***..Just to make this clear, I never said anything to his children at all. I said those things to him, alone in the four walls of my house. His daughter has been bad mouthing her dad at any opportunity she gets when she's alone with me. Tells me the most horrible things about how he treated her mum. He thinks the sun shines out of her a** so I set him straight on a few things. I did go off, but I apologised afterwards and he forgave me but it seems he wants to bring it all back! He's also been hurtful with his mouth during our relationship..but isn't it actions which are important!? I mean we all say stupid stuff in anger. Right? I have them over every Wednesday for dinner, I take her to Uni when I can. Take them out to dinner and pay the majority of our bills so he can afford to support them. I really have been nothing but good to them. I guess that's why I thought he would come to his senses. 😞
My husband and I have been apart for a little over a month now. Neither of us had cheated, or done anything super bad to each other. Bit of a long story, but it's to do with his 19&17 year olds. I had said some things in anger, and he won't let go of it...despite the fact I have been nothing but kind and loving to those two. 
At the back of my mind, I think he will realise the error of his ways, and want me back, but as time goes on, I am not so sure. 
Have any of you ladies gone through this, and how long did it take him to realise what he has lost? Any advice also welcome.