you have to be really careful when you ask her questions about what is going on... but make sure that she knows that you are safe to talk too... i know with my boys i had them in therapy to help them deal with the divorce and it was a really positive thing... a t would know how to ask the questions.
sometimes kids do cry when they are separating from the other parent... that isn't necessarily a sign of abuse... just a red flag at this point... i agree with perna and pach... there isn't enough to call it abuse... but i would keep tabs on things... i work with at risk families and children... and what i tell my teachers is to keep notes... a date book works really well... lyn