Tenant moved in baby mama and four kids.

[Seintra Mouton]

Husband and wife just moved in about 3 weeks ago with their 2 children. Wife calls me and tells me husband has moved his baby mama in with her 4 kids and a cat. My lease agreement states that visitors are not allowed to visit for more than a week and I don't not allow pets. Wife is saying this may be a long-term thing with the baby mama staying with them.  I will give them paperwork on the pet charging a $50 a month fee for the cat. Wife is calling me for help. Says husband could get abusive with her. I'm not sure if I should just stay out of it or enforce the contract after a week of the baby mama staying there. What would you do in this situation?