We did, after all, have all afternoon. We then got together on the bed and kissed and cuddled, another first for me, before we started to explore each...other again. Mark was fascinated with my reverse PA and asked that I keep it in while we made love. We soon started to suck on our engorged cocks, Mark's being slightly shorter (6 inches) and slimmer than mine. This was ideal for me, as I am not experienced at deep throat. Soon we got into 69 position, a favourite of mine. Mark sucked me deep. That was why it wouldn't close properly. I called a hardware store, gave them the measurements, and the man there told me it would be ready when I came to pick it up. Rachel helped me to set it up and she held it while I put the lugs in it. After swinging it back and forth a couple of times, I closed it, and it sat snug. I opened and closed it again, and it was a perfect fit.Rachel was relieved that now her privacy was assured, and to thank me, we had a little 'us' time, and we lay together, on. I picked up the thick, split strap that my father had used the first time he beat her pussy.“But,” she continued shyly, sidling up to me, ignoring her sister’s betrayed look and almost whispering, “what she hates the most of these ones is the birch on her tits, if she gets more than six or ten.”Returning the tawse to the counter, I picked up the slim bundle of twigs that she had indicated. I swished it through the air, getting a feel for it.“‘Of these ones’? There are others?”“Yes, sir. Not. "Kathy you do look great in the costume." Thanks Omar. I think we'll have a good show."Kathy did look quite fetching in the magician's assistant wardrobe. The outfit had an old West theme. Kathy had the look of a dance hall girl. The dark blue and spangled one-piece outfit featured Kathy's bare shoulders and more than a hint of her perky cleavage. Two straps supported the bodice. To feature her lovely legs, the costume was cut high on each hip. And there was more than a hint of her very cute.