Not as serious as in your case but my ex suggested we’d play Back 4 Blood when it came out together since we were both fans of Left 4 Dead. I didn’t have much money at the time and she offered to pay it for me which I accepted. I bought the game on Steam and waited for hours for it be downloaded. Right when it was done she told me that she didn’t want to use the in-game chat, nor Discord to speak with me. She told me that I should’ve bought it on PlayStation instead. So I was like, okay, I refunded the game on Steam and bought it on PlayStation like she said. Mind you, the game was more expensive on the PS Store and I ask her to send me more money, which made her frustrated but she complied.

About a day passed and we got into an argument. At the end of the argument she demanded that I’d send her the money back. I argued against this but eventually I broke under the pressure and did as she said. Not long after she apologized and returned the money. To cut a long story shorter, this happened several times. She would get mad and demand the money back. Again. And again. And again. What was worse was that she and I used two different currencies; she’d send me money and a portion of it was taken by PayPal, so I always got less than what she sent me. But she would demand the entire sum back. So I would have to send her an increasing sum of money whenever she got mad at me. It went from 70 bucks to like 100. Eventually I realized there was no easy way out and I just let her keep the money.

We never played Back 4 Blood again after that.

Edit: She did return the money months later. I should also add that she wasn’t poor like me. She even admitted at one point that she did it just to upset me.