"I'm sorry, Mom," she said, hiding his face even further in the crook of Caroline's neck. He didn't want to tell Caroline what had happened to him yet. He didn't want to see Caroline sad after hearing the real story because there was Zack's name behind all this incident. Caroline loves Zack so much that Zoa can't bear to hurt Caroline's heart. Let everything run as it should, if later Caroline finds out the truth it means she must also be willing to lose her love because Zoa is sure that Caroline will not want to live with that man after what she has done to Zoa.