Making grounds on sexual intercourse

simple let her do what she says. it simple threat to blackmail.. it is not easy in court what she was saying , if you are in fault then you worry otherwise be calm dont react before any action comes. let her go legally then your chance was there to answer her in court if she was not able to prove her allegation you have upper hand , so keep calm ,, and try to keep record of her all unsocial activities with date and time.. with proof and even let other well wishers and elders should also be involved in the matter to make her understand that she is doing wrong.

approach local family counselling centre for counselling

If appears that both of them certainly need proper counselling  please.