The stepfather and daughter-in-law, their two-person three-legged vaginal pressure strengthening training opens the door to a quagmire of an affair! The husband who always fails... Daughter-in-law Yuna consults with her stepfather about whether there's something wrong with her body. The stepfather, wanting to see his grandchild, kindly agrees and checks Yuna's vagina, then proposes further vaginal pressure enhancement training. Thus, Yuna's 'tightness' improves rapidly, even making her husband ejaculate immediately! Unable to be satisfied by her husband, Yuna ultimately seeks out her stepfather... #班長P
