So you are supposed to have no life besides work and kids. Steer the ship. Not your job to worry about her schedule. You can arrange child care during your time.
My W said she was going to care for the kids while I was at work. I quickly said no, on my days they are my responsibility and vice Versace on hers.
M 37 W 34
T 12 M 8 D 7 S 4
Need break 4/12/15 W no ring 7/7/15
Separate room 4/12/15 Separate living suggested 8/15 W moved out 11/1/15