DS was out with FIL after school today (something they both like to do).
When DS sat down to tea I asked him if he'd had anything to eat or drink already and he got a bit upset. He said he knew he should tell me the truth but FIL had told him not to. It seems that FIL bought him a pepsi while they were out but told DS not to tell me .
Should I call FIL and ask for his side of the story?
Or AIBU and should forget it?