Kill Switch by Penelope Douglas

And then I let my eyes fall to the two hickeys on his neck,
one of them damn nasty looking. I knew exactly where they
had come from, too. The girl who’d dealt them probably had
twice as many of her own.
“Some girls need to learn that sucking dick like a vacuum
is a skill you don’t waste on a man’s neck,” I told him, flicking
water with my fingers as aggravation settled in my gut.
“Maybe you should watch while I retrain the one who did that
to you.”
“Aw, jealous?” he teased.
But then a look passed between us, and I wasn’t fucking
laughing. His cocky smile started to fall, and he straightened
up.
Will was my best friend, and what was mine was mine. He
knew that.
An awkward silence passed, but then he noticed something
behind me and jerked his chin. “Uh-oh.”
I looked over, seeing Arion walking toward us through the
water. She’d let down her hair and had her hands tucked
behind her back. I had geared up all week to be in the mood
for something far different tonight, and I wasn’t sure I wanted
to stay.
But my plans fell apart, I had nothing better to do, and if
she wanted to play, maybe I could get my head in gear, after
all. She was pretty enough, even though she had a set to her
eyes that made her look a little mean and her jaw was more
square, making her look too thin and giving her an air of
hardness I didn’t like. She wasn’t sweet.
But whatever. I wasn’t the one who would fuck her.
As she reached us, she pulled her fists out from behind her,
eyeing us coyly, and opened the left, revealing a turquoise
triangular pill and handed it to Will.
X.
“Hell yeah.” He took the pill and washed it down with his
beer.