"I want you to do something for me," Margaret said, panting.  

In the stairwell they had tried several positions before settling on doggy-style.  It gave her vertigo looking down the stairwell.  But at least the steps weren't digging into her back.  Shannon had her bent over the railing with one leg thrown up beside her arm.  His bicycle shorts were wadded up around one ankle, and he was sweating profusely.  But not because he was winded.  Shannon had cardiovascular endurance like a reindeer.  And Santa would make it on time for Christmas this year.  He had the kind of physique that suggested he could do this all day long without stopping to catch his breath.  

"What?"  He asked, sweat droplets raining down all over her naked back.  ...

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