[Even with all this comfort around him, his father's reassurance and Frisk's...well, Frisk's everything, Asriel still shakes his head. The tears are coming faster now, harder, and he wants to wipe his eyes but at the same time, he doesn't want to let go, as if letting go will throw him back into the Underground.]

N-No, 'm sorry for, f-for...I lied, I wanted to make sure you were okay b-but I was scared you'd be upset i-if you knew it was m-me, and...and...I pretended to be B-Bob the Temmie and I'm sorry...

[Well. That's not all he sorry about, but this is a start.]