K-Stew, who knew you had it in you?

Welcome to the Rileys inexplicably continues to perform poorly in limited release at the box office, but we here at Mr. Skin are heralding it as a ground-breaking perv-formance from Twilight temptress Kristen Stewart.

You'll recall that we added a Rileysscene to Kristen's Mr. Skin page, featuring the sexily scowling siren, clad in a crack-splitting thong, giving James Gandolfini a lap dance.

The scene looked rather lonely all by itself on her page, so we've included another scene from Rileys. Gandolfini wakes up the bratty beauty, and she responds by ripping off the bed covers and flashing more thong.

The even better news? The thong is crammed so far up her cute little crack that it looks like bare butt!

Watch here, and welcome Kristen Stewart to the Rileys... and to a hopeful future in the skin hall of fame. This is an ass-picious beginning!