What did your daughter say when you asked her how long she had been staying with grandma? What did grandma tell you when you asked her? What did your ex- say when you asked her?
Mom was incarcerated for how long? You didn't figure out that she was incarcerated until after she was out of jail? You didn't believe, at the time, that the facts warranted going to court and trying to modify custody?Quoting Jrod72010
And, as you have moved to another state, that increases the burden upon you of trying to modify custody.Quoting Jrod72010
It's not at all unusual for a parent who has had a medical or behavioral health problem to get help from family members during recovery. With you in another state, and with your indicating a long history of grandma's acting as a caregiver for the children, it's not particularly surprising that grandma stepped up.
When you try to modify custody, you need admissible evidence to support your allegations. At this point, is all of the information you have to support your allegations coming from a seven-year-old child?
Does that mean you asked grandma and she told you, in effect, "It's not my problem", or does it mean you haven't yet asked grandma about the problem?Quoting Jrod72010
With all you're saying about mom, I'm a bit confused about why you agreed to make her the primary physical custodian in the first place.

