I was up early to help DH and DS2 (age 15) get packed for a day out. Just as they were leaving I noticed a puddle round the base of the downstairs loo. DS2 said he hadn't been in there this morning. DH said he had used the loo but didn't make the puddle, and hadn't noticed it. I expressed frustration at this, but he said, in an unsympathetic tone, that he wasn't going to apologise for not noticing something. I was annoyed he said this, especially in front of DS2, who often claims, in the same dismissive tone, not to notice the mess he leaves in his bedroom, the kitchen, the bathroom etc. Aibu to expect them to notice? I don't expect a profuse apology, just a "Oh, sorry, I didn't notice - I would have cleared it up if I had."