When I was widowed I did the dafest things , I cut out foods my husband enjoyed because I felt guilty he couldn't share with me. The evenings were hell once the children went to bed, this was early because they were five and seven, I played the records he bought me over and over and over, our elder daughter now in her forties gets upset if she hears 'She', I didn't think they could hear it, must have been awful for them. He loved photography so I had rather a lot of his photographs framed, I framed his work from art college, but I couldn't have one photograph of him out. I had a baby sitter so I could go and stand in a telephone kiosk at night because when we dated and it was winter we would stand in it to get out of the rain. I even went to the cemetery and lay in his grave - I made sure there was no one around. One night I decided enough was enough without him, I went up to my bedroom to get sleeping pills , just wanted not to cope with life without him, our younger daughter's bedroom door was open and she looked so peaceful, it hit me then that I was about to inflict grief on them, I got myself together .
I say this to try to explain grief can cause anyone do to things which are in no way normal behaviour and for no other reason, it was a long time ago.
Don't stay away from her Stansgran, she may be relieved she doesn't have to be a carer any longer or she may be frightened and lost. But don't allow her grief to affect you, you cannot take here grief away and she could exhaust you. Take care of you X