Oh I am all about IC drama and if given the opportunity I will lead with that right out the gate 9 out 10 times because it helps you find your character at their darkest hour so to speak and it provides insight into the whole fight or flight theory.
I can definitely see her calling him when her back is against a wall (literally) and because she isn't one to ever to make calls unless you're important to her, then he would know that something was wrong. She lives on text messages or handwritten letters, calls not so much. Those are saved for her parents and others who are equally important in her life.
The easiest option for trouble would be a douchebag boyfriend who is a bit too controlling and while she wouldn't have given two shits about leaving him and calling his bluff on the amount of power that he thinks that he posesses, she has a child now and she won't put that kid in any amount of danger. She wants to protect her daughter (I hope a daughter is okay for the kid).