Borrowed by the Billionaire : BDSM Billionaire Menage (Part #1)
Laurel Adams

But this wife of a high-powered executive thinks her husband is joking when he says that he intends to make her fantasy come true. When they take her in a penthouse apartment, and her husband shares her with his billionaire boss, Jessie becomes insatiable.
But the pleasure of her first menage turns to something else entirely when the billionaire insists on borrowing her for the entire weekend...
Reader Advisory: This is a 4,000 word short story that contains sizzling scenes of MfM, oral sex, menage, and wife-sharing.