Daughter in law torturing in laws

We are senior citizens and ours is self earned property and we are staying here. We havent taken single penny from our daughter in law. After marriage she has started using lot of abusive words on us (in laws) and asking us to leave the home so that she can get her parents and live with them. As house is self earned we didn't leave. Our son has taken her away from us and staying separately. After that also she is coming to our house and giving us mental torture by using abussive words. We have given police complaint and they have taken a wwritten statement from her that she would not come to our home and use would not use abussive words. But after one month she started the same mental torture. When we go to police station, they will send one constable and he is send our daughter in law to home. Everytime we can't go to station when she comes. This has repeated 2 times. Now we are tired of this and planning to sell the house and move to an aashram. Please suggest us what to be done. Thank you for replying.