Husbands mother harasses us

We live with his grandmother for another couple weeks, due to us signing our lease in the next week. She was allowing us to stay with her upstairs in her home for the time being. Thing is, she has a disabled adult child whom my husband's mother takes care of every other day. Unfortunately, husbands mom consistently harasses us whenever she comes over to take care of her sister. The second she sees my husband walk in the door from work, she tries saying hello, asking if they can speak privately, etc.

We cut off contact with her months ago due to her behavior toward us. She neglected my cat she was taking care of, I called her out & ever since then, I've been a 'whre & a cheater' in her words. She would tell my husband to get a paternity test & that she was sorry she ever told him that being with me was a good idea. She wishes bad on our unborn child. She calls him a drug addict for smoking weed (little does she know, he quit 2 months ago). She still has her little comments whenever she comes over.

He tells her to leave him alone more times than I can count & has told her she will never meet our baby. No court would allow it due to the risk of parental alienation. We have proof of a few things so that part is certain.

-What can we do so she can stop harassing us? Do we call the cops? His grandmother is an enabler & allows his mother to say these things, telling him 'you only have one mother'... it's just getting tiring & we don't want to deal with this for the next couple weeks until we move out.