Question. Need opinions lol

Sorry this is so long.. This is kind of a rant post and a question post. I kind of already know what I want to do BUT it's to do with "family". My fiances sister. I'm pregnant. 17w6d today. Anyways.. let's start with, I was totally okay with her. For the first couple years he and I were together. Until she went off the deep end and started using dope and drinking a bunch of alcohol. Which I don't like to be around. She ended up homeless and her child's father got the daughter. She went through boyfriend after boyfriend and ended up finding dumb excuses to leave these guys. And ended up living with us for a while. We told her no drugs here. At all whatsoever. Or we would kick her out, she agreed. Did good for a while and we thought maybe she was over this phase of bullshit. BOY WAS I WRONG! She ended up leaving to a friend's house for a week or two and we told her If she stayed gone much longer she needed to come get her things because it was useless to her her shit laying around if she wasn't here ever.. well she came back and ended up coming down on, you guessed it! Meth... well she finally got over the whole 10 year old attitude and all and then about a week later left to her friends house again, came back high as fuck. A couple days later she was looking through all our shit looking for things to take and sell for more meth. We questioned her hardcore when she started going crazy "cleaning out" my brothers closet. We ended up finding evidence of her doing drugs in the house so we kicked her out like we said we would. In the time living here she stole some clothes from me. Cigarettes from my family and other things from my family. About a month after she moved out my brother was in his closet looking for something and found a rock in a baggie. Yeah . I was fucking livid... anyways we threw it away and contacted her and let her know we found it and threw it away and told her she isn't welcome on this property again.. so that was all before I got pregnant.. fast forward to two weeks ago and she texts me on her boyfriends phone and asked how I'm doing and how baby is. I was civil. She apologized for all the shit she did.. I don't believe her because she honestly crushed every single but of trust I had for her. . She asked me if we could get past this so she can see her niece or nephew when he or she is born. I said "ill be honest.. I don't trust you around my family. You stole from us. Lied to us and your own brother and all we were doing was trying to help you.. I don't think I will be able to get past this. And I can't tell you I'm sorry for feeling this way because I don't feel sorry for it." She said "I just want to get past this for the sake of That baby" I didn't reply.. I'm not even sure what the fuck she means by that.. for the sake of my baby?? Ummm.. lmfao or else what? The baby doesn't need to grow up around a liar and a meth user.. and someone who will possibly steal from them later in life... what do yall think? How would you react? Did I handle it alright? I have done nothing but try to help this woman and she fucked it all up..