SS, does the school have an official tardy policy. Such as, if you are tardy X number of times then you have detention, or your grade is affected, or something like that? If so, H needs to be made aware. If not, then maybe you could say, her teacher has said that she's out of sorts on the days she's late because she's rushed to put her stuff away, etc. I'd try to frame it from a school perspective so as not to make it look like you are the one trying to control H. And if all that fails, I'd probably let it go for now. D will soon be old enough to be upset with dad herself about being late.