Kill Switch by Penelope Douglas

And I stopped.
“I like it when you have your secrets,” he went on, his
voice hot and threatening. “It drives me insane in all the best
ways. And maybe I have secrets, too.”
“You want me to be suspicious of you?” she challenged.
But then she let out a breathy groan, and I took another
step down, the wooden stair whining under my weight.
Fuck! I stopped, my face etched in pain. They hadn’t heard
that, had they? Please, please, please… Did they even have
wooden stairs in the original cathedral? Wouldn’t they have
been stone? Stone doesn’t make noise.
“You’re not suspicious?” he asked. “I spend a lot of time
out of town, Rika. I can get whatever I want from anyone I
want.”
She whimpered. “Yeah, you can, but you don’t.”
“How do you know?”
The bed creaked, moans and breathing followed, and I
shook my head, wishing I was deaf instead.
They were fighting.
While they were having sex.
It was weird.
“Because you’re not stupid,” she threw back at him. “No
one will feel like me on your body.”
The headboard banged into the wall faster and faster, and
my head filled with their grunts and moaning, their panting
picking up pace.
“Rika,” he breathed out.
“You would never risk losing this,” she taunted.
“No,” he agreed. “I don’t want anything but this. Fuck,
baby.”
“I love you, Michael,” she whispered loudly as they got
caught up in what they were doing. “I’ve always loved you.”