I think we ought to live happily ever after.

Howl said, "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 make a good deal more eventful than any story 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," added Howl.

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.

Love is not sufficient. It never has been. Stories that claim otherwise are lies. There's always SOMETHING after happily ever after.

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

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