Susan Sarandon is quick to mention that she’s “not much like Sharon,” the character she plays in the new film Jeff, Who Lives at Home, which opened yesterday. But that’s obvious. Sharon is the movie’s B-story, a disappointed beauty who thought she would live a life of “kissing under waterfalls.” Instead, she’s an office drone and an exhausted single mother of two man-children – “one of whom [Pat, played by The Office’s Ed Helms]has gone through the checklist – job, wife, house – and is miserable; and the other [the title character, played by Jason Segel] who seems to do everything wrong,” Sarandon said in a phone call last week.