At the ripe old age of seventeen, Donna had decided that "happily ever after" didn't exist for freaks like her.

Happily Ever After isn't really the end...

The same as real life, there is no happily ever after.

I want to be someone's right now, Simon, not their happily ever after.

And they lived happily (aside from a few normal disagreements, misunderstandings, pouts, silent treatments, and unexpected calamities) ever after.

I think we ought to live happily ever after," and she thought he meant it. Sophie knew that living happily ever after with Howl would be a good deal more hair-raising than any storybook made it sound, though she was determined to try. "It should be hair-raising," added Howl.
"And you'll exploit me," Sophie said.
"And then you'll cut up all my suits to teach me.