I have moved out of my moms and now my kids are staying with her. I don't want her to get custody of my kids, I want to have custody where no one can take the girls without me knowing.

Where is the father? By default you have custody unless there is a court order saying otherwise. Before such an order is issued you would need to be contacted.

Why did you move out without the children? Clearly there is a lot more to this story then you are telling us. Without details its hard to help.

Without details its hard to help.

Agreed.

And why are the kids not with you, if you have and want custody