I did get a lecture text from her last night. Something about making sure S5 homework was all done before she gets him. I ignored it. Did not even feel like validating it.
Pilot, imo you missed to boat on this one. You may not have liked W's tone, may not have felt like validating, but in the end it was about S, not her. The kid needs to do his hw, it's not fair to make him pay the price at school in the battle between mom and dad. Should she do hw with him at her place? Probably. But again, this is about S, not her, so let it go and next time help him with his hw before you drop him off. That way you know it's done.
