It only takes a handful of words to turn a tale of something with a happy ending into a shocking realisation of less pleasant outcome.

Tale With a Sweet Ending

Two pairs of eyes looked deeply into each other. Trust. Loyalty.
Affection. That was all they needed to know. It was going to be
‘til death did they part. The boy had made his decision that this
scraggly pup at the animal shelter was the one for him. “Bowser”,
he murmured to himself, “that’s ‘is name. Mum. I’ve picked one!”

Tale With a Twist

Two pairs of eyes looked deeply into each other. Trust. Loyalty.
Affection. That was all they needed to know. It truly was for
better, for worse, ‘til death did they part. “Let’s find a
sheltered place to spend the night, Bowser”, the homeless man said
to the scruffy mutt beside him as they wandered off down the dreary
city alley.