I hear ya and feal for ya. I had to do the same thing with my mother a couple of years ago and she passed on not too long after I did the move. Now I take care of my 78 yr old father in the same way. It's not an easy thing to cope with, but know that they are as thankful for the care and love you have for them that they gave you before.
I hope all goes well with you, your wife, your mother and your aunt. They should be proud they have a relative so willing to drop so much at a moment's notice to be there when they need it.
Kuross