Insatiable Growth - A Muscular Futa Story (futa/fem, muscle, cumflation, preg, grow)

Same deal as last time: long weeked - time to write some filth!

Hope you guys enjoy this as much you enjoyed Big Mary's Big Day :)

Penny Mulligan sat in the garden of her little house, enjoying the feeling of sunshine on her skin, the quiet noises of the open fields around her and the sensation of her two small hands on her thick, erect girlcock for the first time. She was 13.

In the golden haze of late afternoon, she sat and jerked her hard dickflesh, the breathy rasps of her girlish voice dissipating into the warm air as she felt her pleasure rise. It just felt so much better than diddling her wet little clit or fingering herself. Dark hair falling around her shoulders as her slender shoulders hunched and relaxed, Penny bit her lip as the sensations started becoming more powerful, her young body rocking to the rhythmic stoking.

Hidden behind the white puffs of a wild cotton bush, she bucked her hips into her squeezing, stroking hands, jamming her cock through her grip, the heavy foot-long shaft hard and hot and heavy to her touch, feeling her low hanging girly balls slowly clench and tingle with erotic charge.

There was a soft cry then, loud enough to drive a couple of birds from their roost nearby and Penny writhed orgasmically, her eyes wide in lust and surprise at the intensity of her feeling as thick ropes of juvenile jizz hosed the grass around her like a pressure washer, the heady white goo covering a patch wider around than her paddling pool by the time her orgasm finished.

The sensation was so different than the warm, glowing pleasure of her female orgasms, the rolling peaks of repeated, electric lust. This was like a blowtorch versus a match, a mountain next to a molehill… and it hadn’t quite stopped.

Penny lay on the ground at the edge of a huge pool of her own cum as her eyes flicked open, aware that her body was still writhing in sensual pleasure. She could see her arm ahead of her, lying on the gold-green grass, see it laying there slender and pale, as a final wave of pleasure erupted through her.

Her eyes widened then, as she saw her arm change before her eyes, like a pulse was travelling from her shoulder to her fingertips, trailing a new thickness of muscle and the slight prominence of veins and arteries in its wake. From her shorts there was a little pop and a strange feeling of tightness in parts of her that she had never noticed before.

She looked stronger. She felt better. Her cock was getting hard again.

Reaching down a hand to caress her hardening log, she sighed in pleasure. It was going to be a fun afternoon.

Penny Mulligan, 16 and captain of the high school soccer team pulled nearly a foot and a half of thickly veined dick from the freshly creamed pussy of one of the Orchestra Club girls, her bicep swelling and straining into an orange-sized ball of muscle as her glans struggled to pop out of the soppy, grip