After Sara's fight with Nicki, she is at home with her dad. After Derek stops by, she sits on the couch and her dad brings a cloth to put on her face "so it doesn't blow up like a pumpkin." If you look closely, she says "that stings" before the cloth even touches her face.
She says that on purpose. The cloth was in a pan, probably in hot water. I mean it would sting me too if I had a hot towel on this huge welt on my lip!!
Oh my gosh. Why would you even think this was a slip up? When he takes it out of the pan she says "That STINKS" and he says yeah but it will help your face from swelling up like a pumpkin. Geez people at least make sure you have a slip up before you add it.