Name change as v ashamed about this.
Terrible day yesterday.
DD is nearly 16 and goes to school in a town some miles away from home. I pick her and her siblings up most days.
Scene 1- me in town, in the post office queue trying to sort something, daughter rings asking to know where I am and why I'm late picking them up from school (I'm 10 mn late by this stage). I tell her I'll be there asap
Scene 2, near school; I'm walking up the road with baby walking and empty pushchair. DD slings her heavy bag into the pushchair for me to push. I give her the pushchair instead but am seething.
Scene 3, the car; Another child admits that she is in bottom set for a subject due to not having revised for the test that setted them last year. She has chosen this subject for GCSE. I tell her she'd better do well at this subject. DD chips and says that's really mean, what if she does her best and doesn't do well anyway? I can feel my parenting being undermined here and decide to take a stand about doing the best possible in all our subjects. Mini-lecture/conversation ensues, during which DD continues to insist it is "mean" for me to expect any of them to do well at exams.
Scene 4, still the car, about a mile from home. DD ramps it up and starts interrupting me and contradicting while I'm trying to talk to younger child about said subject and why she must do well in all subjects. I check rear-view mirror for other traffic, brake sharply and suggest to DD that maybe she'd like to walk home from here. She declines and I tell her that she should not interrupt me when I'm talking to her sister then. Silence ensues.
Scene 5, the car, about 150 metres from home. I am still talking to younger child about the importance of doing the best you can. DD interrupts again and attempts to shout me down. I totally lost it. My hand just reached across the car of its own accord (she was sitting in the passenger seat) and slapped her. DS told me I was way out of order (I entirely agree) and violent to boot.
I feel so, so miserable. I have never hit her before, never had to, she's always been so good. It upsets me so much that she is so hostile and difficult at the moment. Where can I go from here? I made a terrible mistake and I'm worried that I've ruined our relationship for ever.