Now, you would obviously never, ever look up your exes on Facebook. Nooo. And even if you did, you most certainly wouldn't run off trying to track them down, risking your job, family and happiness in the process. Posy Fairweather, on the other hand ... Posy is delighted when Matt proposes - on top of a mountain, in a gale, in full-on romantic mode. But a few days later disaster strikes: he backs out of the engagement. Crushed and humiliated, Posy...