Not the parent, but my objection to that would be that your feelings are yours to handle, not me. And for this kind of request, saying that you feel disappointe

Not the parent, but my objection to that would be that your feelings are yours to handle, not me. And for this kind of request, saying that you feel disappointed because I don't have time to finish the tickets will definitely backfire, with a "you should adjust your expectations", and using emotion talk in this context will immediately frame the talk as manipulative.