Is Samantha Cheating On Lindsay With Drea De Matteo?!

Last night Samantha Ronson and actress Drea de Matteo went to dinner at Nobu in Malibu, and not only did the ladies look like they had a fantastic time, but Lindsay Lohan was nowhere in sight! Is it possible that Samantha is stepping out on her fav redhead, or has she already dumped Linds and upgraded to something blonder and hotter?! Okay, so Drea got engaged to Shooter Jennings last month, but she's said in the past that she has the tendency to swing both ways, so who knows what these two were up to!

And get this...when we asked Sam whether or not she was back together with Linds, she wouldn't give us a straight answer (pun intended)! By now Sam certainly knows that this is the kind of thing that puts Lindsay into psycho mode, so we're kinda surprised that she did this - even if it was totally innocent, you know Lindsay's fuming!