As Brooke Richards walks toward you int he Playboy Mansion West gym, extends a hand it's warm and offers that down-to-earth smile, she is instantly familiar. Featured in several of our newsstand specials including Girlfriends and Sexy Girls Next Door and as our July cover girl, the year-old South Carolina native is the center of attention as this century's last Playmate. And why not? As the youngest of 14 children, Miss December is unquestionably the pick of the litter. Playboy: Did you realize that you had an unusual family? Brooke: A big family seemed normal to me becaues I had nothing to compare it to.