This is more of a vent.
We are in the USA.
Today my DD did not have school. I work at the schools in the same town as an aid. I work from home doing customer service part time when not working for the school.
My mother called last night asking if I could come over and let her dog out to go to the bathroom. I explained that I would be working. She asked if my DD would come over since she would be home as well.
I confirmed with DD that she was fine going over around noon to let the dog out to go to the bathroom. No more was said about it.
Today at noon my daughter asked if she could go to her boyfriends home for a few hours. I had no problem with this. DD took the car over. As she pulled up to the boyfriends house (two blocks from my mothers home and 6 blocks from our home.) she calls to tell me we forgot about letting the dog out. I told her to come home and get the key to my mothers house.(we don't keep the key on the regular keychain as we don't use it very often). Then she could just take the key with her to boyfriends house.
She said okay. Let me call Grandma and let her know I will be late. I wait and she never comes home to get the key. I call DD. She tells me Grandma decided to just come home on her lunch.
I call to talk with my mom to say Sorry we forgot and thanks for understanding.
My mom tells me how she should have known that we wouldn't take the dog out and they are just never going to ask us to do anything again.
She also told me not to ask for any help since we can't ever help her.
AIBU to feel hurt/upset about this? Is it unreasonable of my mother to tell me she won't help me anymore because DD didn't go let the dog out today?
For clarification my mother works 5 blocks from her home and gets an hour lunch everyday. She drives to and from work due to medical reasons not allowing her to walk when it is really cold.
I personally did not agree to let the dog out. I was supposed to be working. I didn't end up working because of tech issues with my job. So my mother thought that if my dd wouldn't go do it I should just do it. Again I personally didn't agree to let the dog out. I told my dd to come home and get the key to let the dog out, and even sat here waiting for her. I called to follow up why she didn't come get the key. Then called my mother to find out what was going on.
Never once did my mother call me herself and say hey granddaughter said she would't take the dog out can you do it. She just assumed that I wouldn't do it. DD had told her I didn't end up working.
If my mother had called and said DD told her she wouldn't go let the dog out. I would have gone and done it, then taken up why dd didn't do it with her. But again I was never asked to let the dog out today after dd called and told her grandmother she wouldn't do it.
Any advice on how to handle this? I don't want to have a big fall out with my mother. I did aplogize on the phone to my mother after it all happened. I just want to know what to do going forward. I have a habit of overreacting to little things and blowing them way up. I don't want to do that. So any advice would be helpful on how to handle this, my mother, and my daughter.