Lyric discussion by naftaland 

Cover art for A Woman in Love (It's Not Me) lyrics by Tom Petty & the Heartbreakers

I imagine that the context of this song involves a breakup and her father (who approved of him) has called him to find out what has happened. That would be who the song is addressed to, explaining that he has done all he could, this new guy she left him for is trouble and there's nothing neither of them can do about it.