Busty mom gives swimming lessons to her son who can't swim! A kind mom teaches him how to swim and have sex ♪ In the second half, it develops into an incest swimming competition where they compete for creampies! They change into high-cut erotic swimsuits and have a floating island sumo match with repeated slips, a massive splash squirting showdown on the water, and an incest medley relay! They have creampies on dangerous days underwater, and the son's sperm swims up the mother's pussy and she gets pregnant!