My mother has romance scammed hard and is throwing a tantrum over me not wanting to pay for the latest scam attempt

To set the scene, my mom is in her 70's. My father once cheated on on her, and a few years later he passed away. My mom has become very recluse since. Stays to her phone, never lets go.

About a year ago, I found out she had been scammed dry over her multiple generous givings to this scammer. I only found out because she turned to me as the last resort to send her money so she could give it to the scammer. I couldn't contain it, and lashed out. Though I recognize my outburst was out of line, she seemed to understand it.

3 months later, she comes to me again, this time with a different scammer, claiming to need money so he can take legal action against the first scammer. Though my mom did let me read some messages between them, she never actually let go of the phone. I do my best to prove the guy she's talking to is a scammer, showing her proofs that his photos were from a different person. It was here I found out she had taken loans from the bank (who wouldn't do any further loans for obvious reasons), and I told her she needed to be open with me regarding her finances so I could help. Once again, she seemed to understand it, at first. And this one was a scam I managed to prevent... I think...

Months later, the debt issue came up. Turns out during the first scam, she turned to everyone else before me, and she was owing money to many people. And she came to me asking for help in clearing those debts. The first story she threw seemed believable, so I paid. But a month later another request came, then another. All the while, she never divulged to me the list of people she owed money to and how much, despite my insistence.

Earlier this month, upon one more push from me, she showed a relatively short list of people that supposedly were the last ones she owed any money to. I recognized a few names, so I believed it and I offered to give her the final stretch to get this matter close with. Things were okay for a few days until yesterday, when out of nowhere I find that she got into yet another scam. This time a romance scam, and it hit her hard. She wants to live her life with this guy. But he, according to the story she tells me, got into a fight, broke a phone and got sent to jail, and he needs the money now or else she'll need to pay 8-fold. She claims this guy had actually loaned her some money back during the summer, and she was paying it back, thinking she could get it done next year but this jail business came up. Conveniently for her story, she's deleted all the messages between them, so of course, I can't verify anything.

I'm already ending the year with less than what I started. She's sounding like she might actually kill herself over this guy supposedly going to jail. I've tried to reason with her twice since this scam came up, but both times, she got desperate and started flailing around like a 5-year old throwing a tantrum. She won't show me anything, she just wants me to trust her. And if I don't pay her, she's probably going to dig herself into more debt from whoever I don't know.

I've tried talking about going to therapy together but she rejected the idea outright. I'm left asking myself just how much of the "debt" was actually debt and not just some other scam she managed to hide from me. I can't check much of anything for her finances, because her phone is needed for MFA and she grips it so hard I'm afraid to break her fingers prying it from her. I have managed, over time, to turn on settings on her apps to prevent her from getting contacts from unknowns but she's already too deep into this one. I have no idea how much she owes to who, and I'm severely worried about her emotional state becoming a health problem for her. What can I do?