Incest With A Big Dick, Mother Who Was Fucked By Son's Hard, Slithering, Shriveled Dick, Anzu Komatsu

An, a former company president's secretary, is a clever woman who remarried a man who runs a company. Even though she is a stepmother, she worries about her son, who remains a shut-in at home even as an adult, and gently takes care of him. One day, An gives him a massage to cheer him up. But as she kneads, his unexpectedly large, stiff, and swollen bulge grows, and An, though flustered, unconsciously becomes wet. Her excited son begs her to jerk him off...!