So, there is a short story which starts
"Peter and his dad went to the beach together...."
Then a series of questions at the end, the first of which starts
"who did dad go to the beach with?"
I tentatively suggested (when asked for help) that it could be Peter. But apparently it can't possibly be that and I am foolish for suggesting it. Over half an hour spent discussing it together as a family. I don't know what the other questions are because we have not yet got that far.
So... Who do you think Dad went to the beach with?