Stand-In Mistress

[Taken from FictionDB:] Brad Lancing may be a successful businessman, but he has a bad reputation where women are concerned. Joanne Winslow is determined that her sister isn't going to become just another statistic on Brad's list of conquests -- even if it means she'll have to become his mistress herself! Fortunately Brad is happy for Joanne to be his pretend mistress -- for now! But Brad seems to be playing hard to get, and Joanne's starting to realize it's time to take matters into her own hands. And then the burning seduction she's imagined happens for real....