First of all, the description is for the previous episode. In this episode S12/Ep15, "Blood, Sweat, and Fears", Kris learns she shouldn't try to keep up with Kourtney's workout. Scott sets her straight and tells her what kind of workout she should be doing. He also encourages her and compliments her with the truth.
Khloe is dealing with stress from Lamar's choices and Kim tries to help her to stay strong.
SPOILER: It's Scott's birthday and there's a family dinner celebration at Nobu with an added plan to hit Vegas later. Just the distraction Khloe needs.
Rob is trying to keep any tensions there might be low and doesn't show for the Nobu celebration, but Khloe really needs Rob to be around to talk to.