Kourtney Lashes Out at Scott for Partying

They may be on better terms these days, but a few months ago Kourtney Kardashian and Scott Disick were at each other's throats over his partying ways.

On Sunday's Kourtney and Kardashian Take Miami (see clip, above), she lashes out after she learns he went clubbing with her Dash boutique employees.

"Having my employees at our place and then going out with [them], you find that appropriate?!" Kourtney, 31, yells. "How are they going to listen to me when they're hanging out with my boyfriend and I don't even know it?"

Disick, 27, plays dumb, telling her that his friends brought them over and he didn't know they worked for Kourtney until the night ended.

"You're a grown man with a baby!" fires back Kourtney, mom to their 6-month-old son, Mason. "When your friends leave, it's me and Mason who are here with you. You need to take into consideration not doing things to please your friends."

The full episode of Kourtney and Khloe Take Miami -- during which Khloe slams Disick for his "douchelord" behavior again -- airs Sunday at 10 p.m./ET on E!.