Punished in the Judas Cradle (Enter the Dungeon, #4) by Chera Zade

When my friends John and Allard decide to break in to Allard's father's torture chamber, I agree to accompany them. It's youthful curiosity, really. I want to see the room where innocent women are tortured and killed. I've never so much as disobeyed my parents before, but something in my friends' eyes tells me I'm in for a real adventure.

Now, staring up at those medieval torture devices, I should feel a sense of horror. Instead, all I feel is lust. And my two gorgeous friends are standing right beside me, their eyes on me, their lips wet with anticipation. Here, in this room of torture, they intend to send my innocent body to new heights of ecstasy.

And I'm attracted to the darkest, harshest instrument of them all. The cruel judas cradle, a machine that will stretch me and take me to my limit.