I'm wondering what part of the country they live in. Can you cycle year-round (comfortably - not riding in snow, etc. - I know some of you don't mind riding in snow, but I just hate snow), or is he only cycling part of the year & cramming in as much as possible. We live in Maine & cycle as much as possible during late spring, summer, early fall, once it gets too cold for us we put the bikes up for the year & can't wait for spring again. We do the same with our boat, when it's in season we use it as much as possible. He may just be enjoying his bike while he can, knowing it'll come to an end all too soon when the weather turns cold. They should consider getting a tandem so they can share some of the rides.

She should also be glad that, while she's complaining that he spends too much time away from the house, he could have a lot less healthy hobby. She can either find a way to share the cycling (not all of the time, but some of it), or she can accept that he's not going to be around while he's riding & can occupy herself otherwise. He's obviously content with the way things are & doesn't consider it a problem. Is she sure he's really riding the whole time he's gone?