Kelly Ripa is a doting mother to three grown-up children, and her youngest Joaquin flew the nest in September to attend college in Michigan.MORE: Kelly Ripa details terrifying uncertainty with her childrenThe Live with Kelly and Ryan star reunited with the 19-year-old this week, and shared several photos of them together.Posing in the kitchen, Kelly pulled a mock unimpressed face as she stood next to the teenager, writing in the caption: "Yeah I get it. You're bigger than me...