@Shortt733 ,
Have a conversation. Don't couch it in terms of sex. Couch it in terms of being an equal partnership in everything. Because it sounds a helluva lot like she doesn't do a thing around the house.
Oh, and her office job? Don't get into the exhaustion Olympics with her. Your job understandably tires you out. But hers may, too. Being seated all day is no picnic for your back in particular.