Ano Hito ni wa Naisho

Having sex with a college student next door in the morning, the chairman of the neighborhood association in the daytime, and of course my husband in the evening. Speaking of a reunion, there's also my ex-boyfriend, and two playboys who flirt with me at the beach! It's full of openings♪ This manga will show you the unrestrained sex of a filthy wife who picks up and devours various men here and there! Of course, she keeps this a secret from her husband♪
(Source: Futabasha, translated)
Note: Split into 17 episodes on mobile reading platforms.