Sharon Stone continues to prove age is just a number! On Thursday, September 12, the actress flaunted her fit figure in an Instagram video after exercising in the pool while wearing a string bikini. “Just finished my last workout with Coach @kristinemarie_18 before I go film NOBODY 2 with @therealbobodenkirk. So excited ❤️,” the mom-of-three, 66, captioned the upload. In the post, Stone walked up the steps of her pool in a striped bikini and sunglasses with weights strapped around her ankles. Her adorable pooch stood by and watched as she then turned and walked out of the frame. Bob Odenkirk h…