Reports that an irate hockey mom lifted her blouse, revealed her bra, and taunted fans of the opposing team by shaking her breasts -- at her 11-year-old's hockey game -- has the president of the league "aghast," the Toronto Star reported yesterday. "What prompts people to do these types of things?" said John Gardner, head of the Greater Toronto Hockey League. "It's a little disturbing. We're talking 11-year-olds here." The league has invited the woman to a special committee meeting Wednesday where disciplinary steps, such as banning her from arenas, will be considered.