Yeah, I liked the pun, too.
I guess Mac might play Katara pretending to be Aang's pregnant mother in an angry or sarcastic way, showing that Mac resents expectations, but I don't know if there is enough footage to do much with that. I wouldn't be surprised if it were skipped. The dance at the end of the episode could become a lesson from Rick to Mac that it's OK to be feminine. OTOH, I think it's more likely that Mac is so competitive it will be a dance-off. IDK.