Henry Mills' POV
"Mom." The single word came out painfully from Henry's mouth. It was if the word had been lodged in his throat, unwilling to leave for fear of what its impact might be on the subject. The word must have also come out quietly because Emma didn't even look in his direction. She was staring off into the void beyond his hair, through the window at Granny's diner. After a moment more of silence, Henry cleared his throat. He spoke louder this time as he repeated, "Mom."
Emma seemed to jump out of a hole in herself as her eyes fell hard on Henry. "Yeah?" Her voice was quieter than it usually was - it was very unlike the Emma Swan that he had grown familiar with over the years. Of course, everything about her since Hook's death was very unlike her. Her eyes were filled with an unfamiliar sadness, one that seemed to be deeper than what she had felt when Neal or Graham had died. Perhaps Henry should have been upset by the level of despair that Emma was feeling towards the pirate's death, but he understood (maybe more than Emma suspected) why she would feel this way. In the small amount of time that Killian had been in their lives, he had been able to make a great impression on them both. For Henry, Killian had become the father figure that even Neal had been able to be for him. For Emma, Killian had taught the Savior how to love again. They had really taught each other how to love again, honestly, as their hearts had been mourning losses that had preceded their relationship. For this reason, Henry understood why Emma was no longer acting like herself. Emma Swan, the Savior of Storybrooke, had just lost her second half. Every man that she had ever loved had died, and the weight of that was undoubtedly weighing on her more than the mere fact that she was the protector of their town.
"Killian would want you to stay here," he said after some time, his face stern. Already, Emma's eyes had diverted themselves away from him and to the hot chocolate in her hand. It was cold by now, as the two of them had been sitting in Granny's Diner for the past hour, discussing her possible trip to the Underworld. "And he definitely would not want you to make a deal with the Dark - with Rumpelstiltskin." Emma's grip on the mug tightened at the sound of the Dark Ones. No doubt the memory of being a Dark One was still fresh in the Savior's mind. After all, her reasoning behind all that she had done to the citizens of Storybrooke has been for Killian, who had also been turned into a Dark One at her hands. That alone was why Henry had stopped himself short, though not short enough.
A silence similar to the one from the past hour seemed to overtake them once again and Henry shifted uneasily.
"Convince her to stay, Henry. We can't lose her too." Those had been Charming's words earlier that day in the corner of the hospital room, when Killian had been officially pronounced dead.
They had asked Henry to distract Emma, but he was beginning to realize that there would be no distracting his mother from her morbid reality. Emma was shifting restlessly on her side of the booth, seemingly ready to leave the Diner right then and there. Henry had never seen her so upset before, so pained. Even Neal's death hadn't really been enough to overtake her. She was usually stronger than this... But not now. Not when her happy ending seemed to be snatched away from her. Unless, of course... She headed to the Underworld, which everyone in Storybrooke seemed to be against. No one - not even Rumpelstiltskin - had dared to venture there before, and the prospect of their Savior taking that risk was terrifying everyone. Nevertheless, Emma Swan seemed to find the trip to the Underworld promising. She believed that, like her parents, she could share her own heart with Killian. It was possible that it might work, but the Charming's were fearing the worst - that their only daughter would never return and that she would be stuck in the Underworld to suffer.
The pressure on Henry to keep Emma from leaving was immense and he could see the intense desire in her eyes to leave at that very moment.
"Mom," Henry said, once the silence had become too unbearable.
The concern that filled his voice must have been enough to pull Emma out of her own thoughts. "Yeah, Henry?" Her lips curved into a tight painful smile.
"Mom," Henry repeated, his throat tight. "I just want you to be happy again."
Emma placed her lukewarm hot chocolate on the table and, instead, took Henry's warm hands in hers. "I know, Henry. I know."
Henry smiled at Emma, knowing how he would help her achieve this happiness without her leaving the safety of Storybrooke, Maine.