Illustrious jewelry designer Tara Maria Famiglietti (whose A-list clients include Angelina Jolie, Madonna, Gisele Bündchen, Jessica Alba and Ali MacGraw, to name a few) and her husband, musician Matt White, don’t remember exactly when it happened. But at some point in the last year or so, the pair found themselves living full time in their five-bedroom, two-story cedar-shingle home in Sag Harbor.