Hell yes

"Fuck yes, how does it work?" I replied eagerly, taking the magical gemstone from her outstretched hand.

"I noticed that the tingling grows strongest when you put the rock near your heart," she explained.
"So I held it there and found myself meditating on my deepest desires. It took some patience but eventually I learned to trigger that bolt of energy you felt on command."

"How long have you been practicing?" I asked her.

"Don't worry about that right now honey. Close your eyes." She guided my hand to place the gem just above my heart, and interlocked her fingers with mine. I closed my eyes and tried to focus.

At first nothing happened, my mind raced with a thousand different ideas - I didn't know if any were even possible, or how what the rock could even do. Slowly, a distorted but calming voice drifted out of the depths of my sub conscious. At first it was impossible to understand, as if it were speaking backwards, but it gradually became clearer and I soon recognized it as my mother's voice. What was she saying? I tried to relax further. In a moment of clarity I finally understood her message all at once.

"Give my son a foot long cock, with huge fat balls and enough stamina to fuck me silly" her ethereal message materialized in my mind.

Before I could protest, my nerves exploded with the same shocking magic. My eyes shot open as I stumbled backward in horror. The rock fell at my feet and I landed flat on my bum. I could feel blood pumping into my modestly sized but powerfully erect dick. It pulsed larger, pushing against my broken zipper and straining waistband. As I watched in awe, the sausage-shaped bulge of my cock grew down my pants leg towards my knee. A primal heat churned in my groin and I felt my nuts push uncomfortably against my legs and the ground. The pressure was beginning to become painful. I disregarded my mother's presence and undid the poor straining button of my shorts waistband. It burst open gratefully but did little to ease the mounting pressure of my massive package. I struggled, trying to slide my shorts, but the pant leg had become completely stuck around my thick swelling cock shaft and would not move.

"Let me help dear," Mom offered.

She leaned down and daintily pinched the hem of my shorts. Effortlessly, she magically tore them off me with a loud rrrip and cast the tattered remains aside. I could only groan as my 11 inch member slapped against my stomach and swelled it's final inch. It was as thick as my already supernatural forearms and easily reached my chest. My tennis-ball sized gonads rested comfortably on the cool sand.

"What the - *pant* -hell Mom?!" I exclaimed breathlessly.