Julia and Derek's relationship is put to the test when they attend the secret society sex club's premier party, The Equinox. Readers Beware! Part 7 is dripping with kinky, sexy fun and is not for the faint of heart! The Billionaire's Son 7 : Equinox is a ~11,500 word erotic romance which contains explicit depictions of sexual acts and a sexy billionaire playboy behaving badly. This story is intended for an adult audience only!