The mother-in-law who wanted to have lesbian sex with her son's busty, well-built wife, sneaked into the bedroom one night when they were alone and began to kiss and grope her large breasts. The wife, realizing what was happening, asked, 'What are you doing, Mother-in-law?' The mother-in-law replied, 'I want to show you the joys of lesbian sex,' and hugged her tightly, kissing her persistently. The wife, overwhelmed by the skillful caresses, eventually succumbed to the pleasure. This is a tale of erotic lesbian drama between two pairs of brides and their mothers-in-law.