How would we remove an unwanted family from the house we rent?

Ok so my Mom let her daughter (my ½ sister)husband, and 2 daughters stay with us a while since she got evicted and is homeless. Its been 3 weeks and she has overstayed her welcome. She changed her mailing adress to ours but we never said she could. They are not on the lease and we are renting. They say we have to serve them with a 30day notice even though we never said they could move in nor stay here for an extended period of time. My mom wants them out now since they’ve overstayed their welcome and blown alot of money they could of used on a house. Can we just call the police and have them moved out since they don’t live here.