The sisters confront Scott on this Sunday's Keeping Up With the Kardashians after they learn he's been hanging out and doing water aerobics with Kris Jenner and her friends.
"So Scott, why on Earth are you hanging out with my mom, going to tea parties and doing water aerobics?" Kim asks.
"First of all it wasn't a tea party, it was high tea," Scott replies.
"Like since when were you interested in water aerobics?" Kourtney asks.
Getty Images; E!
"Yeah, that's a little odd," Kim tells Scott.
After hearing this from Kim and Kourtney, Scott says he "knew" going to water aerobics was going to come back to "haunt" him.
"I mean I didn't want to be like a full-blown cougar stalker, it's definitely not the most normal thing on the planet," Scott says. "So maybe I shouldn't hang out with the cougar squad."
Take a look at the video above to see Kim and Kourtney hilariously tease Scott for hanging out with Kris and her squad!
Keeping Up With the Kardashians returns Monday, 2 October 9:30PM, only on E!