From the New York Times bestselling author of Looking for Mr. Goodbar comes the story of two women whose relationships to conjoined twins puts their friendship to the ultimate test.

A haunting story of an obsessive relationship; physical, spiritual, and sexual bonding; jealousy and eroticism; tenderness and exploitation; a woman who draws her closest friend into a bizarre union; the two men who marry them—want and need them—despite their own inevitable attachment; and wildly sensuous fantasies that suddenly come true.