He says to me, "I will never let anyone hurt you."

This is when I made my first mistake... I believed him.

He said, "We are more than best friends... We are greatest friends. We are here to protect each other. We are like big brother and little sister."

He gains my trust and makes me believe that I am safe in his presence.
Constantly reminding me of sibling love.

Then, one day... It happened.
The thing I knew was going to happen all along.

He takes me boating, knowing my fear of water and my history of almost drowning.
He does that thing that makes me trust him.

He takes us out to the middle of the river. He calls me, "Little sis."

Next thing I know, he is threatening to drown me, if I don't do what he wants.

I am scared. What do I do? Thoughts are speeding through my head.
I played along and after he says,

"Little sis. You know how much I love you."