how to react for herrasment

my lover was at home. we both were in love for the past 2 years. her father promised us to let her marry and involved my parents also. but presently he's forcing her to marry an NRI who was his friend's son. that person coming to her home and touching her and misbehaving with her. I'm far away from that place. she's not able to face them . we are being help less because of family prestige and all. can anyone give suggestions please. I'm not able to see her facing those harrasments