cooking, shopping and cleaning...there aren't enough hours in the day to get everthing done around the house and she has a hard enough time trying to find an hour to run/exercise a couple times a week. Up at 5:30 to get the seminary kids off...middle schoolers at 7:30, elementary kids off at 8:30, kids start coming home around 2.
If I told my wife to go get a part time job so she could "contribute" she would probably slap me.