When their house was blown up, Gailyn and Joey were kidnapped by Nanny, who brainwashed them with her "pixie dust" and forced them to forget about their parents. Gailyn and Joey were collectively codenamed Shatter-Box and joined the Lost Boys And Girls.
Living with Grandparents
They were rescued by Jean Grey and Cyclops, and then settled with their grandparents in Annandale-on-Hudson. Together with their grandparents, Gailyn and Joey were guests at the wedding of Jean and Cyclops.
Some time later Jean and Scott visited the Grey's house, and Cyclops tried to check the children for mutant powers. This angered Jean, who wanted a happy childhood for the children.