Jean-Ralphio Saperstein (Ben Schwartz) lied for years to his dad about going to math camp, going so far as to send postcards and bring home trophies.
The truth comes out in the “London: Part 1 and 2” episode of Parks and Recreation (Season 6, Episode 1) during a meeting to discuss a dispute between his father (Henry Wrinkler) and his friend Tom Haverford (Aziz Ansari). Dr. Saperstein started his own knock-off of Rent-A-Swag to try and put Tom out of business after Jean-Ralphio told him it was his idea and Tom cut him out of the business.
Puzzled by Jean-Ralphio and sister Mona Lisa’s lies, Dr. Saperstein asks why he would lie to him.
“Daddy-D, Daddy, I lie to you all the time,” he tells him. He goes on to tell him that the math camps he told him he went to was all a big charade. “I don’t even know what math camp is,” he says.
For her part, Mona Lisa (Jenny Slate) never fesses up to her repeated lies and awfulness (after all, as Jean-Ralphio explained introducing her to Tom for the first time “she’s the worst.”)