It is established in the episode " Mother's Day " that the Professor was once Mom 's lover and employee. However, they could not maintain their relationship due to Mom's lust for power, including when she decided to weaponize his "Q.T. McWhiskers" toy, prompting them to break up. When Mom takes control of all the world's robots to cause an uprising, her sons Walt, Larry, and Igner attempt to get the Professor to seduce Mom and retrieve the remote for the robots. They get back together briefly, but break up once more when Mom learns the Professor had been initially using her. It is revealed in Bender's Game that the Professor is the biological father of Mom's youngest son Igner — the one whom Mom despises the most.