This morning mum really laid into me extremely angry. I spoke to her on the phone last night Wednesday agreeing to take her shopping the next day about midday which she was happy with. I rang her the next day Thursday at 9.30am to make sure she still wanted to go and again she said midday was fine. I turn up a bit earlier at 11.30am and she was fuming saying she's been waiting all morning to go shopping saying she always goes shopping in a morning. I reminded her she said midday was fine but she accused me of lying and she never agreed midday. I'm really struggling to deal with her anger towards me when I've done absolutely nothing wrong. I try to remain calm and not shout back at her but it's really hard.