By Ethan Blackshaw & Ethan Blackshaw & Joseph Wilkes A man whose girlfriend cut off his penis after discovering he had an affair with her teenage niece has shocked the world by getting back with the woman who mutilated him for life. Gilberto Nogueira de Oliveira, 39, was planning to marry Daiane dos Santos, 34, at the beginning of this year. However, in December, after learning about his infidelity which took place on her birthday, Daiane tricked him during a romantic moment. She dressed in seductive lingerie, got Gilberto undressed and dimmed the lights, then used a rubber band to trap his pe…