A few months ago, DP ex went on holiday without DSD. DSD was selected to be in a merit assembly where she won star of the week. DP asked me to go with him, so I did as I love DSD and wanted to be there for her.
Yesterday, for some reason his ex brought it up and had a go at him for taking me.
Was it unreasonable for me to go? Have I overstepped a boundary?
Her DP goes to school events and my DP never kicks off about it as he's happy he takes an interest.