 "We needed a catalyst," Guza said during an interview with "TV Guide" and Abby filled that role.Each reaction to Michael's confession is very different; With Sonny, "Michael somehow feels like he's let his father down," but in his own way, Sonny also has the "right" reaction to Michael's confession.Carly's reaction is also very out of character, instead of allowing her anger to get the best of her, she embraces Michael.