Season 3: Episode 54: Mama's Baby, Carlton's Maybe
Carlton prepares for a dinner date with his former girlfriend, Cindy, forgiving her for rejecting him several months earlier, but when she arrives with a newborn baby named Carlton Jr., the entire Banks family is stunned. Philip refuses to believe that the baby is his grandchild until a blood test proves it; Vivian reprimands Cindy for not coming to them for advice. Will, however, suspects that the inexperienced Carlton never had a chance to father a baby. Determined to accept his responsibility, Carlton elopes with Cindy to a small-town chapel. While waiting for the preacher to marry them, they realize that they're too young and too incompatible to spend the rest of their lives together. When Will arrives at the chapel to stop the ceremony, he learns that Cindy has confessed that Carlton wasn't the baby's father and called her parents to take her home, leaving Carlton bewildered and heartbroken. Carlton meekly confesses to Will that he's still a virgin, but was willing to marry Cindy, hoping that someday she'd learn to love him in return.