It’s the ultimate May/ December romance.  In the fifth and final season of “Hacks,” which follows legendary comedian Deborah Vance (Jean Smart, 74), she has an unexpected whirlwind romance with rock star Nico (Christopher Briney, 28). Their age gap is an eye-popping 46 years.  “I did think, oh god, I hope he isn’t just cringing,” Smart told Deadline, referring to “The Summer I Turned Pretty” actor. Christopher Briney (pictured at “The Summer I Turned Pretty” Season 3 launch event on July 16, 2025) romances Jean Smart, who is 46 years older, on “Hacks.” Getty Images Jean Smart (pictured in “Hacks” Season 5) said she hoped Briney wasn’t “cringing.” HBO max The Emmy-winning actress added, “He’s thinking, ‘Oh, I’d really like to be on that show, but oh damn, really?’ But he made me feel very comfortable and we had fun.” Warning: Spoilers ahead!…