I think the issue of trust and honesty are very important for both of you.
Checking work, feedback and grading are very important, and the part of our job that is often the most neglected.
Your dd, may have intended to catch-up later as you did. Kwim? (You demonstrated for month, that you were not even looking at her papers.) She should be able to rely on you to follow through when no one is checking too.
If you are too busy to actually grade, L;);)k over her work daily.