Blinking in the darkness of the school auditorium, Rajiv spots his ex-wife Sangita. Her filmy green shawl is flung over the back of the empty seat beside her, reminding him of how their daughter, Alisha, puts a plate and cutlery out for her imaginary friend, Mr. Potato (not to be confused with the toy with the interchangeable facial features). The first time she did this, Rajiv thought Alisha was setting a place for her mother, and he’d wondered if the intention might actually conjure Sangita. “You saving that seat for Todd?” Rajiv asks Sangita. Her boyfriend, pink-faced with thick, blond…