The girls are 3 and 1. The father is very good to the girls but has no where to live in Texas other than with his mother who lives in a small trailer. There are fewer jobs there than here. Nothing was done to you. The children's mother decided to move.
People move for a variety of reasons.
And you are not sharing with us HER reasons for moving. They could have been very well justified. Maybe they weren't, but it was still HER decision.