So I said, “I’m ready to do it if you are. Where did Mom get that stuff?”Just then Mom tossed a tube at us from the doorway. It read K-Y Jelly. ... put some on my finger and stuck it Betsey’s asshole. She seemed to enjoy it so I slipped in another finger. Betsey told me to stop fooling around and put it in. She got on the floor like a dog and I got down behind her. My cock slipped in much easier than it had into her pussy.As we fucked Mom explained, “That’s called the doggy position and you are. “Beg slut!”“Please Sir, whip this slut’s ass!” “Please whip this slut’s ass Sir!”(thwack)I bring the belt squarely down onto her waiting ass.(thwack)The loud slap of the leather to her ass is much more than before and this is obviously causing some discomfort as I can see her starting to wiggle from it’s sting.(thwack) (thwack) (thwack) (thwack)“Thank You Sir!” “Thank You Sir!”She tries to keep up as I continue to punish her ass. I stop only to touch her quickly reddening ass cheeks. They feel. Grinding her pussy in to my chin and nose. There was another “Oh God” and her breathing becoming faster and raspier. Looking at her back, I could see her reach up, I knew she was pinching her hard, pencil eraser sized nipples (she actually enjoyed a slight degree of pain). She pushed down hard again, this time with a steady stream of “Yes, YES, YESSSSSsssss” and as it trailed off, I knew she was in the throes of orgasm. Her knees clamped tightly against my ears as she continued riding out the. “Oh Dad, i love you and i’ll make it up to you tonight.” “You will see.” she promised me. She had adjusted her clothing and hand in hand, we started to walk back. I wasn’t sure what she had planned for that night. She wouldn’t say. I made her promise to be very quiet in the tent. “If your Mom catches us or ever finds out that we were doing anything, I’m dead.” She promised me as i ask her to. That night, about an hour after we were all in our sleeping bags, she reached over and tapped on my arm.