My wife is always making plans for my riding time, spending my bike money, etc. I try to explain the extra ride time in addition to my commute as a health issue (Blood pressures a little high dear, think I need to get in some more exercise, cheaper then doctor bills). The money spent on bikes (It's a safety issue dear, if I just let it go as is it could fail at a critical time when I really need it).

Incredibly, fenders were the easiest thing to convince her on. Less nasty laundry to deal with.