Jesse James & Kat Von D -- More Than Friends

8/16/2010 7:15 PM PDT

Jesse James & Kat Von D -- More Than Friends

What happened in Vegas between Jesse James and reality TV star Kat Von D is more than just a friendship ... TMZ has learned the two were "very affectionate" during a getaway this weekend.

Multiple sources pretty damn close to the couple tell us the two were seen getting all touchy-feely with each other at the Mandalay Bay hotel ... and had a romantic dinner at N9ne Steakhouse at The Palms.

But here's the rub -- if you know what we're sayin' --  they stayed at another very high end Vegas hotel.

Kat Von D's people are playing the "just friends" card -- but we're told "friends with benefits" is more like it.

His and her tats can't be far behind ... if they can find an open space.