Good Morning America's Dr Jennifer Ashton graces our TV screens everyday on GMA3, but during the weekend she's making memories with her close-knit family.MORE: Good Morning America's hosts' homes are another level: Michael Strahan, Robin Roberts, moreJennifer delighted fans on Sunday after sharing a rare photo of her son Alex and nephew Jack during a trip out to the Metropolitan Museum of Art in New York.In the photo, the boys were posing next to a colourful sculpture outside, with the city of