On Vanderpump Rules Season 3 Episode 12, Stassi refuses to let Katie off the hook for attending Scheana's bachelorette party.

As a result, Katie must either fight for her friendship ... or cut Stassi out of her life.

Elsewhere, Peter makes a mistake when he finds Vail's flirting for interest and asks her on a date. As you would expect, it quickly turns awkward.

Also Kristen connects with the woman Tom Sandoval supposedly cheated with in hopes of finally breaking up his relationship with Ariana.