Tenant moved boyfriend in w/o permission

[Che Wade-Walker]

Hello All, My 1st time posting and it's a doozy. Today I got a message from my tenant's mother who says her daughter (my tenant) allowed her convict BF to move my rent house and now the daughter wants him out. He moved in w/o my permission and now must be unwilling to move out because the mother says "The authorities said you would have to evict the squatter". Haven't had a chance yet to talk to my tenant (the daughter) or her mother. I know I need to find out how long he's been there and I need to understand the circumstances of why the mother reached out to me and not my tenant. This is a new one for me. Never had to evict someone much less someone who is not on the lease. Starting my research now. Any pointers anyone can offer would be greatly appreciated.  This is in the state of Texas.

Thank you all