Wife wants me to change my daughter's diapers?

why? I'm the breadwinner. I work hard all day. I shou;dn't have to do anything around the house. I have the office. she has the house? why does she expect me to change my daughter's daipers. right now my daughter hasn't been changed in 7 hours due to this argument and the house is really beginning to stink. how can i get her to change the diaper and realize I work outside the house?