It seems that her daughter's relationship with her boyfriend is not going well, so her mother Mayuka casually asks her boyfriend Kazuaki about it, and he tells her, "My thing is too big and won't fit in...". When Mayuka sees his huge cock, she is speechless at its size... She can't take her eyes off his huge dick, which he desperately begs her to try, and she accepts it, saying, "Just the tip...". The pleasure of it rubbing against the back of her vagina, which her husband can't reach, remains in her uterus forever, and Mayuka can't forget the afterglow...