You're starting to look like you're not really trying to protect your brother from his so-called evil wife but more like you've got your own ulterior motives for making all this an issue. Maybe I'm wrong...not my monkey, not my circus.
As I have said to my mother... My brother has destroyed our relationship and probably not repairable at this point however, I feel it necessary to protect him from ending up in the streets. I have done some digging. They got married in 2008. He moved into her house. In 2011, she changed her deed but only by changing it to her newly married name. The house was acquired during a previous marriage. In 2014, she refinanced and again in her name only. Keeping in mind that her conversation with me included her saying she wasn't ready to divorce my brother yet (this was in Dec 2022 when he had open heart surgery and he was in the hospital). Although the house is my brother's legal residence, if she were to pass suddenly, wouldn't the house go to her two daughters? Doesn't that leave my brother w/o a roof over his head. As I have mentioned earlier in my post, she has trained my brother to put all money he gets from my mother in joint accounts. He has told me that himself that he has to do that because she did at one point. This is why he is getting a stipend monthly. If she sticks it out for 5 years... he gets the remainder and at that point I don't care what happens.
I have also learned that my brother forced my mother to signing a POA and I'm the executor. My mother didn't realize what a POA really entails. My brother was hell bent on this and now my mom will be reversing this. This whole thing has become a huge mess and my mom is suffering the most. Had she just told my brother to mind his business and that her affairs are in order this all wouldn't have happened but we all suspect that the wife was poking my brother to find out details.