Rebecca Roberts and her partner Rhys Weaver were delighted when they found out she was expecting.  Then they found out she was expecting twins, and that’s when things got a little complicated.  The doctors diagnosed her pregnancy with “superfetation”, a rare phenomenon when a woman gets pregnant when she is already pregnant. Today, "supertwins" Noah and Rosalie are a little over 6 months and doing well, and Rebecca and Rhys joined Tom Dunne to tell their story.