My mom never actually stole money from me, though she did a lot of other screwed-up money things. One of her favorites was for her to tell me she would buy me something, to go ahead & charge it on my credit card. Then she'd get mad at me for something totally unrelated and tell me that she wasn't going to pay for it. That stopped mainly because after she disowned me & then...got over that (reowned? not owned by my mom, but not sure what the word that reverses a disownment is) & told me "oh, I'll get X for you, just charge it & I'll send you a check" I told her that I wouldn't be doing that anymore...so she sent me a credit card linked to an account in her name, so I don't have to worry about her pulling that on me (and she does, for birthdays/holidays usually tell me "you can spend XXX on my card for your birthday/Christmas. Just let me know what you get & how much it costs so I know to look for it"). There were 1-2 times when she forgot (I do think she really forgot) that she told me I could charge something, and there was some friction, so now when I charge something, I either forward her the receipt (if it was online). or email & tell her what I bought & for how much, & when. It's worked well for the last 10 years or so, though it does make me slightly nervous.
The other thing she did once is that her sister (my aunt) has a lot of financial problems. Now, I do feel badly for my aunt; all of her problems stem from before she was diagnosed with bipolar and put on medication (this was nearly 30 years ago). She defaulted on a lot of CCs, & eventually declared bankruptcy.
When I was in my early 20s, my mom gave my aunt a credit card in my name. Didn't ask me about it, didn't TELL me about it, just took one of the (many) credit card offers that came to her home, signed my name, and got my aunt a card. I found out when aunt called me to thank me for doing it. A furious conversation with my mom ensued, and I told her that if she ever did that again, I'd call the police & report her.
I did let my aunt keep the card, which I know (believe me, I know) was a bad idea. BUT, she did use it responsibly for a few years, and then closed the account once she was able to get a credit card in her own name. The main reason that I allowed it was that my aunt and I had had a lot of candid conversations once I was diagnosed with bipolar in my late teens, and her struggle to live with it, and I knew a lot about where she'd come from, and how much better she was doing, and I chose to trust that she really was doing well. I feel really lucky that I was right.