My question involves criminal law for the state of: Texas

I live in a different state and during a recent visit to m My X-wife, she informed me that she got involved with a man who is using her as a Slave, he uses her as his punching and whipping bag and loans her out to his other S/M buddies to use her anyway they please. She said she has been tied before for 8-12 hours while men she does not even know or see their faces sodomize her while she is tied up.
She said it is consensual but she had tears in her eyes. She has been off her medications for almost 2 years. We have been divorced for 16 months.

She has severe bipolar condition to the point of schizophrenia. I asked her if she wanted to stop and she said she enjoys some aspects of it but she cannot just walk away now as she feared what those men would do to her. She refused to tell me who the man is or to go to the Police and inform them.

I am very angry over this, she is mentally ill and she is being used as a sex toy, she told me one time she was abused so bad she could not walk for 4 days and had to stay in and not seen anyone for over a week from the bruising.

What legal actions can I take to stop this? Can the I get the Police involved if I can figure out who the guy is and get him exposed?