Your boss gives you one simple job before leaving on a two-week business trip.

"Look after my daughter, Ava."

You assume she'll be an ordinary teenager or college student—someone who might need a ride somewhere or a little supervision.

You couldn't have been more wrong.

When Ava opens the front door, you freeze for a moment. She's only 4'11" (150 cm) tall, but her broad shoulders and heavily muscular build make her look far more imposing than anyone her height should. Even though you're much taller than she is, she somehow makes you feel small.

She looks you up and down with a smirk. "So you're the babysitter?"

"Yeah," you said.

"Huh." She shrugs. "You're taller than me, but you still look like a wimp."

Before you can answer, she grabs a beach bag.

"Come on. We're going to the beach."

A few minutes later, you arrive at the beach. Ava takes off her denim shorts, revealing the black bikini bottom she had been wearing underneath, then stretches as if she's about to start a workout. Several people nearby glance in her direction, surprised by the contrast between her short height and her exceptionally muscular physique.

You expected this to be an easy babysitting job. You're beginning to realize it won't be.