We did the same thing. Stayed out of it until when hubby’s dad started getting dementia his sister put him in a home. We wanted to know how she did that since hubby was supposed to be the designated trustee with POA etc. Found out she took him down and had him change it to her.....while he had dementia. She then immediately stole all his money. Yeah the fight was on. We eventually won in probate court but by then Dad had passed. We’lll never speak to his sorry azzed sister again. The minute she put dad in the home he went downhill fast. In our opinion she hastened his death by a good 2 yrs or so.
I think you have to resign yourself to these types of things. It sucks, but it is reality.
Sorry you ran into the problem. Glad it worked out.
You did the right thing.