Complex sentence: He recognizes her and gives her a choice: if she will give him an exclusive on her story, he will help her reunite with Westley, otherwise he will tell her father where she is and collect the reward.
Split into simpler sentences: He recognizes her and gives her a choice: if she will give him an exclusive on her story he will help her reunite with Westley. If not he will tell her father where she is and collect the reward.