Jennifer Aydin and her husband, Dr. Bill Aydin's son, Justin Aydin, is (wait for it) now 21 years old. "Happy birthday, Justin!" "Happy birthday, Justin," she wrote over the photo, along with the number "21." "Happy birthday!!" In addition to Justin, Jennifer and Bill are the parents of daughter, Gabriella, a college freshman; 16-year-old son, Jacob; 14-year-old son, Christian; and 12-year-old daughter, Olivia.