Sharon Stone recently showed off her rarely-seen adopted son in an endearing photo she shared on her Instagram feed. The handsome young man, who is already towering over his doting mom, has caught the eye of fans who remember him as just a baby. In addition to Laird Vonne Stone, Sharon has two other adopted sons whom she’s spoken about in the past. Congratulations are in order for Sharon Stone’s son, Laird Vonne Stone, who recently accomplished the momentous milestone of graduating from high school. Laird’s doting mom took to Instagram to proudly boast of his accomplishment with a sweet mother…