The next morning I woke up ready for my wife to have her way with me, as she typically does when we have the morning to ourselves. But that day she woke up with some pretty intense back pain. I thought that might be the end of our fun for the weekend. She assured me that it wasn't and that it would just take time to loosen up. I decided to go for a run. I returned about an hour later to find her relaxing in the hot tub naked...again.
"I'll join you in there after a shower." I told her.
"No rush, I'm just trying to loosen up my back for you." She said with a grin.
I ran to the bathroom for a quick shower, eager to join her in the tub. I walked out of the bathroom to find her already out of the tub. She was still naked and leaning over the edge of the bed. She had placed a couple of pillows on the edge of the bed to prop herself up. Her legs were spread wide and her magnificent glistening brown butt was staring me straight in the face.
"I thought that...maybe you could...rub my back?" She said a bit sheepishly looking over her shoulder.
She gave her ass a bit of a wiggle to try to invite me over to her. I was happy to oblige and strolled over to her. I noticed a bottle of baby oil lying beside her, which I picked up and squirted a generous amount of oil on her back. I began to massage the oil into her back, paying particular attention to the area I knew to be in pain. She immediately started to push back slightly against my growing erection that just so happened to be pushing in between her ass cheeks. I took a moment away from her back, knelt down and messaged her luscious ass. Making sure that a good amount of oil was spread over and in between her cheeks.
I stood back up, enjoying the sight of my sexy wife half standing, half lying face down on the bed. Her beautiful brown butt was staring at me, almost asking to be played with. I returned to the task at hand, continuing my massage of her back. I moved in closer, reaching over to her shoulders. This caused my now completely hard cock to press firmly against the top of her ass crack. The motion of my rubbing caused my cock to slide up and down her slippery cheeks, quickly had my cock rock hard and dripping precum.