Eugene is telling this as a bedtime story to their kids.
Like, all I could imagine is this adorable little brown haired kid with green eyes sitting in bed watching as he makes this really dramatic face, and begins
“This is the story of how I died!”
and they look a little scared, so he quickly goes
“Don’t worry, this is actually a very fun story and the truth is, it isn’t even mine. This is the story of a girl named Rapunzel and it starts with the sun.”
And they both look at Rapunzel real quick because, hey, Mom’s in the story, great!
And by the end they’re both teasing each other and making sappy faces and the kid’s giggling and half asleep and
“There you go, kiddo. That’s the story of how we met. Sweet dreams, sunshine. Tomorrow night we’re gonna tell you the story of how your Aunt Elsa froze her entire fucking country because of her emotional issues.”