My friend's parents do this and I always found it weird. The husband works and lives in Texas while the mom is in New York. DH's aunt and uncle also do it- the mom lives in Maryland and the husband works in New York.

Logistically it has become easier when DH travels. I get in a nice routine and when he's around throws everything off. Even though I work FT it's simply easier doing it on my own and not having to deal with someone else. My DH is FBI fled agent so he's gone all the time.