Cheated by a woman who promised me to marry and then did not marry me

Hi all, I am in huge mental problem right now. A year back i came across a girl whose Roka has been done with another man. Initially we were friends but after sometime we liked each other and decided to marry. She decided to break the earlier engagement with another man. We had been physical also (not intercourse) before her marriage. But things turned worse and she married the original guy and left me. She came after 3 months of marriage to me and said that i still want to marry you but can not marry as her family will face problems. So she promised me to give her 6 months and after that she will tell her decision. Also she told me that she has no physical relation with her husband till then. So i agreed and gave her time. But after 4 months she told me that i have physical relations with my husband earlier and you can go now. I told her why did not you tell me the truth before. She cheated me since start and used me like a trash. Since start i spent around 3 lakhs on her. Forget money as i loved that girl like anything i got mentally too disturbed. I told a few things to her mother (she is in POLICE) but she begged to me and at the same time gave me threat of legal action if i tell anything to anyone. I want to tell everything to her husband but i am afraid that what legal actions can be taken against me. Also what legal action can her mother take against me as she is police. I have proofs of her being physical with me before marriage in whats app messages and her after marriage commitments to me in audio recordings. I would be really grateful if anyone can advise me on the same. If possible also provide your number. I will contact you asap. Thanks in advance...