Jenny's mouth opened to scream but her gasps had stifled the air in her lungs and so she let out a silent cry when the smooth thrusts of my steely length finally pushed her over the edge. Her saturated pussy seemed to suck me deeper inside her for those few instants when her eyes closed tightly and her world shattered around her.

I couldn't hold myself back any longer, she shifted her movements from harsh slams of her hips to slow, sensual rotations that swirled my hard cock around inside her tight, welcoming, fleshy folds.

The first surge made me see spots before my eyes and spurt inside her convulsing sex. Sliding myself out of her was utterly impossible against the unrelenting waves of pure bliss that warmed me through. I had never felt anything quite so intense as I shamelessly filled her juicy slit with my hot, gooey cream.

Slowly, the mixture of lust and carnal excitement that had kept our bodies going so hard for so long finally seemed to fade. Those aches and pains in my muscles seemed to sink right down into my bones to join the pleasant tingly afterglow of great sex.

Jenny panted and slumped down to her knees and soon after that, I fell back onto my bare ass onto the dirt floor of the forest. She rolled herself over and spread her legs to show off her practically glowing pink pussy to me. A slightly disbelieving smile was shared between us as we fought to control ragged breaths and I saw my own cream begin to seep from her well-fucked slit.

“I'm on the pill." She managed to reassure me and I saw a surprised look come over her face as I burst out laughing.

“Sorry,” I reached out to stroke my hand across her smoothly toned leg.

Her track pants were still hanging around her ankles.

“I just thought that was incredible. I mean, it was totally irresponsible and it won't happen again but... it was also kinda worth the risk."

Her confused Look brightened into a brilliant white smile.

“Totally.”

“Should we head back?"

“As soon as I can feel my legs."

With those words, she crawled over to me and cuddled up next to me amidst the dirt and the fallen leaves. I settled my lips in against her mussed up hair and felt her little mewl of contentment at the action. I know what we did there was indeed stupid and irresponsible, but I was young and in love and I knew without a doubt that I would be marrying that girl one day.

Of course, I was very, very wrong about that.

Eventually we both managed to get to our feet and make the hike home.

Jenny went to see the doctor later that day and picked up some Light sedatives to help her sleep and was told to return if her night terrors persisted. She didn't tell them that she had also grown claws during the night for fear that her medication might include a trip to a mental institution.

We kept up the brutal new training regimen. After a few days of it I felt Like half of my body was already dead and the rest was playing catch-up. We ran several miles almost every day and Jenny usually felt the need for a quick marathon of sexual activity shortly after we finished. As I slowed down, she only seemed to run faster and ride me harder.

Her sleep had returned to being much more peaceful and she told me that she'd stopped taking her sedatives after a few weeks. She felt great.

She looked even better. I even think that I started to grow some new muscle thanks to trying to keep up with her. After a little while, when we were sure she wasn't going to randomly sprout claws again, I took her along to my gym. This thankfully meant that I could slow down the pace a little whilst Jenny constantly tried to out-run the treadmill.