Brandi Glanville doesn’t like to be told what to do. The Real Housewives of Beverly Hills star explained why she flipped out on Kyle Richards during last week’s episode of the hit Bravo show. In an exclusive sneak peek of Tuesday’s episode, the best-selling author tells Yolanda Foster she “just got pissed.”

“Kim [Richards] was just off. She wasn’t herself,” Glanville tells Foster of her costar, who admitted to taking something prior to the girl’s poker night last episode. “I went over to talk to Kim and Kyle was like, ‘This is my sister,’ and she grabbed my hand and when she grabbed my hand something scratched me and I just got pissed.” (In case you missed it, Glanville and Kyle got into a physical altercation after Kim tried to leave the get-together.)

“Of course I was drinking. It was a party. I’m a grown up. I’m allowed to have drinks,” Glanville then snaps at Foster, who asked if she had been drinking. “I can do whatever the f—k I want.” 

“If she thinks I’m mothering her then maybe she should behave like an adult,” Foster then tells the camera.

Watch the dramatic sneak peek above. Tune in to The Real Housewives of Beverly Hills Tuesday at 9 p.m. on Bravo.