Feel so confused

I have 2 prior children that my mother in law has been raising for the past 4 years  I wasn't able to for certain reasons basically I choose what was best for them at the time. Now that I'm in a stable relationship and head on straight I'm thinking about bringing them to live with me. From Florida to Texas.  I've tried to stay in contact but my x mother in law but she is horrible!!!! I've tried to see the food out of this but now that I'm stable infant my boys.  Should I requests that they come stay with me?!?! I don't want to hurt them.