金蓮把昔日西門慶的枕邊風月傳給情郎陳經濟身上。 丫頭秋菊接二連三告正妻月娘金與陳不光“丈母女婿通奸”， 且和丫頭春梅三人嬉，但月娘都未抓到把柄， 反臭罵秋菊。
為減少外人閑話西門寡婦們，月娘叫陳經濟在鋪子宿，金蓮與陳一個多月不見，春梅借外出取草填枕頭，替金蓮穿針引線見經濟， 陳拿紅娘先解饞， 春梅帶情書回家給金蓮聯幽會。
Ping dies of angry from Jin, Ximen dies of lust, what are the destinations of Jin and Mei?
Jin passes all of Ximen’s love-making tricks to Chen, Ximen’s son-in-law. Maid Qiu, tells Ximen’s 1st wife of the scandals of “In-law play” and threesome with Maid Mei, however, the 1st wife criticizes Qiu for having no proof.
To avoid gossip, the 1st wife demands that Chen sleeps next in the Drug Store. Jin and Chen cannot see each other for a month, to help, Mei makes up an excuse to go out for pillow grass filler, she actually visits Chen during this trip. So thirsty, Chen “takes” Mei right away. Mei later brings Chen’s love letter to Jin, set up Jin-Chen dating.