So what present do you give an attractive, vivacious woman for her 40th birthday? A weekend of pampering in a spa resort, a holiday abroad, a new car perhaps? Karen and Brad are getting ready to celebrate her birthday, but none of the options they discussed particularly appeal to her. What she really wants is something which both she and her husband can share; a present which she has been secretly thinking about for some time. She wants to send out an invitation, a long-held desire of hers, to have a total stranger join them both for a night of passion. Karen knew that this was risky and might end in disaster, but then again...it might not. In truth, only time will tell...