um
you have had the puppy 6 weeks and you just found this out?
did he just say at 1st he knew how to take care of a puppy & you never discussed this?
you could have stopped a lot of stress in your life if the communication would have been there . I think with a PLAN , like a list you leave with a child babysitter things can reallly improve & al lwould be happy. make a spot on the daily sheet for the kids to let her out from her nap, then back in for some together time with them.
you should stress that puppies NEED a place to call their own , they think of crates like a den , its instinct. they need someplace to go when they want to.
I have tried leaving my 2 yr olds (dogs) out all day, but they never get a really good nap, & are grouchy. so off they get put in their crates for an afternoon nap. makes them much better companions.
good luck I am sure things will work out.
I'm going to go out on a limb and guess that a man who has a wife, children, a job, and goes to university is probably not an idiot. He surely could see that his wife was crating the dog at times throughout the evening.