This is the perfect wife!

Maybe to give him time to prep for his trip. That's my best reasonable guess. He may also have just come back off the road from a trip last week and she's letting him rest up before setting off again.

He must be really good to/for her. Seems to be the kind of guy I want to meet because he's the kind of guy I want to be.

I think she is the one working out of town, leaving him at home, and maybe he is a terrible cook or maybe it is a surprise.

Good point, the wording is a bit ambiguous.

I heard somewhere that in Japan, whenever someone is having guests over, wives start cooking 6:00 am in the morning