On school days W picks all 4 kids up at 7am... Drops 3 at school right away... Only had baby then until 2pm... when she drops baby off at my house. I go pickup the 3 others from school and take care of them until bedtime... I work 12am-8am (sometimes mandatory overtime). My sister will be living with me until I am 1st shift (about 1 1/2 to 2 years away)... So sis is just in the home while they are asleep.
On werkends or days kids not in school W has all of them 7am-2pm. On our off days... We both have them and perform all the duties alone.
It works very well and the best case scenario for the kids.