16 year old boy loves 26 year old married girl how to proceed legally

There is a girl she is 26 year old. She has two child. husband He didn't love her sometimes he abuse her. But girls want love from them. I am her neighbour. I am 16 yrs old. I am study in 10 standard. From now last 5 to 6 months talking to Me I just told her all the things become good but nothing become good. And there is a person who know all the things about me and her.we are talk each other he blackmail her to do something wrong. And her family know about me and her talk each other. Her family abuse him. She asked me what I am doing I didn't understand what I do for that I am asking what she do for her family they love them and if her family don't after 5to 6she want to left her family. What happen if she left her family? THANK for reading