(massachusetts) Evicting Adult Child From Home

My daughter is 34 years old, she is currently 29 weeks pregnant (baby daddy not involved). She is a “recovering” drug addict. I found a crack pipe in her room (she said it was old). I need her out of my house. Her plan is to raise her baby here in her bedroom down in the basement. I am 70 years old, single, and retired. My daughter refuses to pay rent anymore (she originally was paying 600 a month but stopped 6 months ago). She eats my food, takes my things, makes a mess, doesn’t clean up after herself, leaves her clothes all over the house,etc. She has told me she was going to go into a sober house. She’s been saying it since July when she found out she was pregnant. November 27th I brought her to some recovery program (IN RI) for Mother’s and children , she left days later. Lied to me saying she got kicked out. I called the facility they told me she left on her own. I called the cops to say she was on my way back to my house and wasn’t allowed. The cops said she’s been living there and she can stay, that I need to evict her. Please help me with the process to get her out. I’m nervous I’ll loose the case because she’s pregnant and expecting but I can’t take the stress anymore…. I have helped her for over 10 years I’m mentally and physically exhausted.

Something else to add.. she lives at my house but uses someone else’s address in Rhode island to get food stamps, health insurance, and 450 dollars a month from the government of RI for expecting a child. Is there anything I can do with that info??

Thank you so much.