Sister-on-Sister Action: Nicky Hilton Ogles Paris' Breasts

And we thought it was gross when Ashton Kutcher ogled the chest of his step-daughter, Rumer Willis.

But at least there's no blood relation between those two.

The same can't exactly be said about Nicky Hilton and Paris Hilton.

Seen here, the spoiled sisters are enjoying a night out... and one of them is enjoying the view. We guess we can't blame Nicky - Paris Hilton nude isn't terrible looking - but someone should should show her this Pamela Anderson photo.

If you wanna ogle huge boobs, the former Baywatch star is a much better option.

And if you wanna really turn up this night of girl-on-girl action, give Katie Rees a call.