Mark obsesses over his slutty, teasing sister-in law. *********** My wife Sarah and I hadn't had s*x for 3 months. Sarah is a beautiful woman, with long brown hair (which she usually wore up), brown eyes, high cheekbones and inviting lips. She worked out regularly and it showed. Sarah is slim, and her strength training classes had resulted in some definition in her arms. Her boobs aren't big, but they are firm as is her ass. I had always found her very attractive, although if I am honest s*x with her had never been white hot. When we met we were both 30 and ready to settle down. We got along great, fell in love, got married just over a year later. We used to f**k regularly, then we gradually slowed. I got tired of her putting me off until finally I stopped trying. Other than a lack of

