You and Carl have been waiting years for Rick's return after Michonne said that he was still alive ,everything was getting better.

in the meantime you and Carl had became parents,your beautiful son was the spitting image of Carl,you two often joked about how you wasted 9 months only for him to look like Carl.

your son was now 4 when Rick came back,Carl run to his dad while you were standing behind them,holding hands with your son.

Rick still hadn't noticed the little kid behind you.