Making out with your mother is too fucking hot. Feeling your mother's body respond to you eating her pussy, her scent possessing your being, and the otherworldly feelings rushing in your mind and racing through you with unimaginable desire. That deep feeling of love a mother has for her son now unbridled with lust would be so fucking erotic to experience.
If she were my mother I would eat her pussy until she squirted her hot love-lava in my mouth.