Just an update to my situation - I posted yesterday with the question "how do you put up with a nasty sister and brother in law?"
Got mom's bank statement this morning. Sis wrote checks out to herself and had my blind mother sign them for $1800 in less than 30 days. Paid $708 for a storage facility for her own things. Mom had $5637 in deposits, and they did 64 transactions totaling to $10,514 in one month. Yes, I called Adult Protective Services. Charged $1000 for rent AFTER she wrote $800 in checks to herself.
Yes, I'm going to offer for Mom to live with me, and NO, I won't charge her rent! Mom is 82 years old, barely weighs 100 lbs, no way could she need that much spent on herself in one month. Grrrrr!! I'm embarrassed I'm related to my sister.