It seems from your post that this was a near escape for you and that it is difficult to find the time / excuse to go ahead with an appointment. Karma?
Maybe a lucky escape? Or a nod to what's really valuable in your life and what you might be jeopardising for a couple of hours of 'fun'. If you think that's the case, why not use the money to treat the family over the weekend or get a sexy gift for your partner?
Alternatively, you might not believe in happenstance or infidelity. If so, then just reschedule an appointment and go see a beautiful woman!
Either plan should relieve the stress from your week of nursing the family.....