TV exclusive Janet Caperna is just as surprised as everyone else when it comes to co-star Michelle Saniei’s apparent new romance with hip-hop legend Dr. Dre — but she’s not ready to jump to conclusions just yet. During an exclusive chat for Page Six’s “Virtual Reali-Tea,” the “Valley” star, 39, admitted that she first learned about the headline-making relationship the same way fans did: online. “Oh my gosh, well, you guys probably know more than I do — because I found out from Page Six,” Caperna shared. “So I was getting on the flight here, my mom texts me and goes, ‘Now, why is Michelle holding hands with Dr. Dre?’ And my mom, sometimes she’ll send me a Facebook article or something and I’m like, ‘That’s AI.’” Caperna figured that a burgeoning relationship between Saniei, 37, and Dr. Dre, 61, was fake news, but then realized the pair’s date night last month at Nobu in Los Angeles was the real deal. Janet Caperna shared her thoughts on “Valley” co-star Michelle Saniei’s apparent new romance with Dr.…