I have, however, from young, only worn shorts at home. So that one pair of maternity shorts has had to do quadruple duty, along with one stretchy pair of shorts I've had for a while. However, in my el hugeo preggo deluxo state, the stretchy shorts just isn't comfortable anymore, and my clothes seem to get dirtier faster as the pregnancy advances.
So.... I've taken to raiding the hub's underwear drawer and I have to say, I should have started wearing his boxer shorts around the house much earlier. Man, they're comfortable.