I don't know your personal situation,, but it might helf if you could step up a little more to be a more positive influence to this girl. Ya know, those "seeds" can be planted all the time. If you have a good relationship, just a little extra pat on the shoulder, hug, if she's open to it... just a postive, continuous dialog...Anything to keep those thoughts in her head and not her dad's negativity. A little hand written card with a scripture verse....find a positive, uplifting verse...something she can keep as a reminder. Even if you are not a person who normally would do this type of thing, give it a try for her sake. I can tell you are sincerely wanting to help her.
Having raised 2 daughters, (not an easy task! ) I just find those kinds of little things work wonders. Good luck!