What she is implying would constitute a 'substantial and continuing change of circumstance' opening the door for me to go back and have custody modified.
"Interfering with Child's Relationship With Other Parent
Acts, omissions, or circumstances of a managing conservator that thwart the child's ties with the other parent, such as interfering with visitation, may constitute a material and substantial change in circumstances. A material and substantial change occurs when a managing conservator, by word, attitude, or deed, directly or subtly alienates the child's affection for, or poisons the child's mind against, the other parent. "