Women blackmailing and harassing

I am 40 years old and met this lady on social media for paid sex who is 43 yrs 1year ago. She has a daughter 17 yrs and a son 14 yrs. We frequently met and her daughter was taking our pics whenever we go out to restaurant or market. I also used to stay sometimes in their house and had been paying around 15 - 20 k every month. Now she is blackmailing me telling I should marry her or else she will inform to my wife, in-laws, parents and will also come to my office. I went to the nearby police station and lodged a complaint and the SI called the lady and warned her and took in return not to go to office and any issue go legally. After few days she called my wife and sent her all the pic and voice msg. I told all the truth to my wif. Now she wants to go and meet my in laws and parents and tell about my involvement with her and see that they separate from me and thinks I will go back to her if I am left alone. Please let me know how I can stop this lady from doing any further damage to me.