Mom

From Futurama Wiki

Mom is the CEO & shareholder of 99.7% of Momcorp, one of the largest industrial conglomerates known to Man.

As one of the richest people on Earth, she maintains her public image as a sweet, mother-like figure through the use of a fatsuit, a heart-shaped hairdo and acting when in fact she is emaciated, foul-mouthed, and malevolent. She is the boss of her three sons, Walt, Larry, and Ignar.

She was once romantically involved with Professor Farnsworth, but their breakup left her even more bitter. Seventy years later, she still harbored feelings of hatred which quickly but temporarily changed to sexual passion.