She becomes younger

Melisandre gasped in shock as I worked my power through every cell of her body. Instead of aging into the old crone that she was, the reverse happened.

Her soft breasts became even fuller, the small wrinkles on her face disappeared completely. Her copper colored hair changed into a brighter red and she lost a couple inches of her height till she had to slightly look up to me to maintain eye contact.

As I admired my handiwork and cupped the soft breasts, my vision began to blurred and my legs felt weak and then darkness....

.....(10 minutes later).....

I woke up several minutes later with a horny redheaded teenager bouncing on my steel-hard cock. My mind was foggy and I simply laid back on the cold stone floor and let the lusty teen continue pleasuring me. She was incredibly beautiful with pale skin, crimson hair and deep blue eyes. The teen gyrated her hips with the experience of a whore despite the fact that her pussy was incredibly tight and looking down I could see the remains of her virginal blood leaking out of her stuffed cunt. It was only after she rode me to her orgasm that my mind cleared a bit and my memories returned.

"Melisandre." I said dreamily finally remembering the name of the one I was fucking.

"Your Grace, I feared the worst when you fainted." she said as she continued to ride me through her orgasm. I frowned when I realised the cause of my collapse. Clearly my powers had limits and I wasnt as all-powerful as I was told. But then again I did turn back her biological clock by around 300 years.

Finally regaining most of my strength I sat up with the vixen still in my lap, her soft breasts pressed against my chest and our faces inches apart.

"Forget the Lord of Light, you are mine now. Your body, your soul, your heart, it all belongs to me. Now and always." I said

"Now and always." she reiterated as she picked up speed and her movements became more forceful. We were both sitting on the cold floor and our movements were restricted but Melisandre still retained her centuries long worth of sexual experience and within minutes of slow humping we were both on the edge.

"I feel like a horny teenager once more." Melisandre moaned in my ear as she sensed my body reaching its limits. "Do it Your Grace! Cum inside your faithful servant, fill me with your seed and bless me with your child!"

My mind no longer cared whether or not we were engaged in a twisted mating ritual to honor her fire god. My cock was buried had a sexy teenager's deflowered pussy and nothing in the world, not even God could stop me from cumming deep inside her.

"Yesssss!" Melisandre's blue eyes rolled into the back of her head as the first spurt of my sperm triggered her orgasm. I continued to pump gallons of my virile swimmers straight through her cervix and into her fertile womb. And as we both collapse on the stone slab and kissed like long-time lovers, we knew the deed was done.