“I vow …” Sin’s voice fills the room. “To fuck this cunt.” My already soaked thong is shoved to the side, and a finger enters me, causing my hips to buck involuntarily. “You vow to be mine, don’t you, little demon?” I nod the best I can, which isn’t much, and moan a yes when a second finger joins the first. “We vow to never be apart in this world or the next.”