Sorry I'm not really managing to get on here enough to answer your questions in time! So if you feel he lost out on say a couple of hours over night, then you may not be able to make all of that up the next day, but perhaps aim for BT 30-60mjns early and so reduce A times earlier in the day to make that possible? Don't take that as a strict rule, though, by trying out a few things you'll discover how she prefers to make up for lost night sleep.