To provide some context - after having my child and some complicated circumstances I took longer off after maternity leave ended and had to leave my job as a result. Before looking for a new job I spoke to my mother who encouraged me to find flexible work which she would support, by providing childcare for the first few months until I get settled, and then put my child into nursery.
In order to facilitate this for my first shift she volunteered to come and stay over the day before, for one shift and then I would drop my child to hers for the other shifts in the second half of the week. I was extremely grateful for this suggestion and offer. We agreed timings and when she would be coming over.
On the day she was supposed to come over I sent her a message to confirm what time to expect her. I had already planned the day out roughly based on what we had agreed. She replied to say she would actually be coming much later. I asked why that was, but did not push her to come earlier. She said she had undertaken too much washing and an extra task of doing washing for my sister (who is on holiday with her newborn) and she wanted to drop that off and do her bedsheets for when she is back - which would be 5 days time. She also proceeded to say she wouldn’t be getting much time to do her things since she has agreed to look after my child. It was sounding to me like she was now burdened. So I offered to change the childcare to just 2 days and 1 of those she can take my child with her if she would like to do any finishing touches at my sister’s
Later on she called me shouting, asking whether I’m being sarcastic and that I got offended by her mentioning helping others instead of me. I tried to explain I’m trying to make it easier - as I was expecting she would be organised to come over but it sounded like she was getting overwhelmed by the commitment. She kept shouting and following up with voice notes and not listening to what I had to say. Until she gave me an ultimatum if you don’t want me to come tonight then tell me. I said I’d rather not see her in this stress and that I could just drop my child (who was looking forward to her coming over) over tomorrow for my shift.