Blackmailing to file rape charges which is false

A married women had an affair with me i am bachalar student. And now she and her husband blackmailing me to file rape case against me. Which is totaly wrong she did affair with me with mutual consent. I did not make any promise of marrege or love i frankly told her that i do not love you. She was with me for the sake of sexual favor. Now i am denying to sex with her then she blackmails me that she is going to file case against me and her husband provke her and favours her in this case because her husband wants to punish me that i had done with her wife. I had all the call recording. Since i am a student preparing for gov job so i do not want involve in court matter because if i am involing in court matter then i can not get gov job. Sir what to do sir please tell me. Even I do not able to my parents. I am so frustrated and tensionised my life will becomes hell day by day. What should i do sir.