Craig: I couldn’t help but watch my sister’s ass as she swayed out of the room, to go and wait in the garden. I was so horny—it had been two days since I’d last cum…Petra had surprised me in the shower, and jerked me off until I’d cum on her face. God I loved cumming on her face. Is that sick? I know it’s wrong, but…four million dollars. I’m sure you can understand. I glanced over to see Mason DeGraves, the rich fuck who had gotten us into this mess in the first place, checking her out as well. One month ago, my sister and I had read an ad in the paper, offering four million dollars for two months “work”. Siblings only. We were suspicious, of course, and doubly so when we learned who had placed it. Lord Mason DeGraves, billionaire playboy. “Playboy” is the right word for it, too—he’s older than Howard Hughes, and half as attractive. He spends his time offering sick wagers to people, and people keep accepting them…because he always pays up. This one was simple—for two months, my sister and I couldn’t get off except by each others’ hand. We’d accepted—of course we’d accepted—and planned to just abstain until the time ran out. One week later, Petra was jerking me off for the first time. Two weeks later, she was blowing me, and pretty soon after that it became a daily thing. It wasn’t one-way, either…I’d gotten her off so many times I could recognize her impending orgasms blindfolded. And then the other night, we’d had a weird thing…her pussy had touched my dick. And it had …