I had a new baby a few weeks ago, I called my 'estranged' mother and offered to bring him over to meet her, she wanted to 'think about the arrangements' .... she never called me back. Xmas Eve. Great parenting ...
Might be that she thinks you only got back to her to look after the children. There are a lot of people who leave their parents with flying flags in their late teens or early twens only to return later to move in with them so that they look for their children and so much more. Maybe your mother would change her mind if she knew that it is not just about this.
People say that I am very close to my mother, when they see us together. I cannot complain really, even though we have our quarrels, but we work them out. She was pretty good in giving me the space and freedom that I needed in my life from a very early age.