[vellum]

This is a thing with a lot of couples when they retire. They're not used to being around each other 24/7 and drive each other crazy.

http://www.huffingtonpost.com/2013/08/09/divorce-after-50-re...

In Japan, they call it Retired Husband Syndrome, and it affects 60% of older women there.

https://en.wikipedia.org/wiki/Retired_husband_syndrome