Nocturnal Sins by Danielle James

Sex, secrets, and murder cast a shadow over my family that we couldn’t escape.
When my life started falling to pieces, the only one in the world I could turn to was my step sister. We’ve shared a connection ever since we were little.
But we’re not little anymore…
Our connection morphed into something that could only be experienced in secret once everyone was asleep. It turned into something with teeth and nails threatening to rip our family apart from the inside out.
Our forbidden desire nearly blinded us to the real darkness trying to rip us apart from the outside. Something sinister determined to claw its way in.
Something we were determined to keep out.