Think this through. The sex was good last night. I hadn't planned on seeing her again, but how bad could it be, right? It's not worth calling her bluf... and possibly ruining my marriage. But, blackmail never ends!My wife and I have our issues, but I don't want a divorce. I still love her and we have a long history together. I just feel rejected by her and went looking for someone to meet my sexual needs and make me feel wanted again. I didn't think anyone would get hurt. I guess that is the. As I'm doing this, I turn around to see my sister-in-law in the kitchen smiling and doing a silly little wave at me. I turned out the last light and walked over to her and she said her husband is already snoring and she just came out to get some water. I tell her to hold on and I walk quickly back to my room to do a quick check on my wife. She's out like a light so I return nervously to the kitchen. My sister-in-law had just finished filling up her glass and she turns around right as I step. I kept looking at my watch all the time counting how long they'd been together and my dick getting hard wondering how many times she had reach orgasm and how many times he had fucked her. 30 mins went past and then an hour.I started wondering whether I'd get a phone call to go back. I wasted some time having a coffee and then decided to go exploring so got on a bus to some local shops we hadn't explored before. By the time this was done and they had been together now for 2 1/2 hours so I walked. If you see someone headed this way, tap my shoulder twice, then put your cock away while I pretend to fix the buckle on my Mary-janes, then tap me again when they are gone." You nod obediently.I'm on my knees in front of you, my eyes glued to your face as you watch out for people coming towards us. I slide your cock all the way down the first time in my mouth, gagging a little, drool rolling down to your balls.Then my head is bouncing back and forth, my mouth fucking your cock. My tongue.