Thank you all so much.
I feel some relief.
I do have power of atty and her will from about 3-4 years ago when she was still fully oriented. Originals in the safe deposit box, copies in my files (where for all I know he's already seen them). My daughter and a lawyer family friend (not practicing, but knows her stuff) have certified copies, as well.
Right now, Mom can't focus well enough to remember her own birthday, often can't finish sentences, and handles no paperwork, legal or financial matters. I do all of that and have for some time.
I don't think I can videotape her and have it make any sense. Also, she is still a manipulative N, so if my brother tried to get her to agree to something new, and it offered her a glimpse of power or new drama, she might go along.
I am thinking I might just mention to her, if I can bring myself to break the veil open, "Don't sign anything." On some level, she knows my brother was abusive to me and is a liar, so perhaps she'd retain that advice.
Still, any of her daily caregivers could testify that she's not fully competent, so whatever he got up to, it probably wouldn't be legally effective. I hope. I will ask my lawyer friend, however. Thanks for the reminder that I'm not helpless.
The only scary part is that when he invaded my computer, it was during a period where my mother was toying with me about the house (will she, won't she) and I had written her an outraged, anguished letter about how unfair I felt it was not to TELL me one way or another when what I wanted most was just to know what would become of me, so I could plan something for my future (and I also confronted her about why she kept trying to force me to be under my brother's thumb in perpetuity, rather than either leave me the house free and clear, or leave it to him, or force the sale). She kept hinting that she'd leave it and my brother would "let me live there". I was angry and told her, who's been here taking care of you, and before that taking care of you and my father, while my brother was completely absent, and in his own life going bankrupt.
It was about a year after that letter, I think, that she said to me after one of her hospitalizations, you know, I now believe it's completely fair for me to leave you the house and him the contents. So she went back to her lawyer (with her morning caregiver driving) and did that.
But...my brother stole that letter. And I've always felt he would try to use it as coercion. I'm not sure how, since I basically was saying to my mother, it IS your right to choose whatever you want to do. Just tell me what situation I'll be in, and don't leave me under my brother's thumb.
Oh well. Nothing I can do about that now.
But I really hate having him here. Maybe he does know that he's inheriting the "stuff" and wants some of it now, or something. I don't care. Let him take off with the silver or punch bowl. It will be his anyway. And I have no plans to cheat him or fight him over anything. I just want to be left in peace.
Hops