Paris and her sister Nicky Hilton Rothschild sitdown for a candid conversation like you've never heard them before.

Nicky and Paris talk sisterhood stories, engagements, bachelorette parties and marriage. Then, things get feisty as they discuss Letterman, Britney, good times, bad times and… their mom as a housewife!

They aren't holding back their thoughts on any of it. They reveal their similarities and differences and why Nicky is the gatekeeper of the sister pair.