To think it is rude to not acknowledge this?

[BlossomOnTrees]

Was taking granddaughter and her friend to school. The friend forgot her water bottle on the way to school so I went to the shop and bought her one for school. No acknowledgement at all from mum. Aibu to find this rude?

• Well clearly going against the grain but I would thank the OP if she had bought my DD a bottle of water, and offered to reimburse her for it. If it had been a water bottle, which we know are more expensive, then I would have insisted on reimbursing.

But I am not a dick who takes other people for granted...in the minority it seems...*

Or people are acknowledging that OP hasn’t said the parent actually knows that she has done this.