On the show, Kourtney is telling Khloe and their friend Simon Gebrelul that she went for a run in the heat.
Khloe then tells Simon, “You know she’s 97 lbs.?”
“Guess what? I gained a pound. I’m 98 [lbs],” Kourtney interjects. “You know Mason is 62 [lbs.]?”
Watch the clip from Keeping Up with the Kardashians below…