A very fitting one, considering her harem just grew by one.

An incredible tearing sensation ripped through her cockhead. With tears in her eyes and barely able to keep from screaming, Sarah gripped her penis tight, staring at the tip. What she saw was surreal: The glans was developing a horizontal divot running all the way from her slit to the ridges on the side - and it was starting to run down the whole length of her dick.

The divot deepened and the pain intensified and made Sarah double over. Tears were now streaming down Sarah's face, but the pain already faded. As her vision cleared, Sarah saw the craziest thing she had seen all day - and after her brother's growing tits and the fact that she had a pornstar cock, that was saying something. In fact, the latter was no longer true. From her crotch, two pornstar cocks proudly stood, throbbing with her heartbeat. One was right where one would expect a dick, the other sat directly above it.

With trembling hands, Sarah grabbed both her impressive lengths in one hand. The feeling was almost disorienting. The pleasure wasn't any more intense than before, but there were to sources - Sarah's brain almost shorted out from the insane feeling. Falling back into her recliner, she started slowly stroking her dicks with alternating movements.

Her hands knocked into each other halfway, but the additional juddering just enhanced her first double-wank. The delicious slow movements quickly had her moaning and squirming so much that she almost didn't notice the slight throbs in the jiggling flesh under her diamond-hard nipples. Peeling her eyes away from her leaking slits, she could hardly contain her excitement: Slowly, but surely, her breasts began to gain mass! Gone where the times when her little brother had bigger tits then her!

The pleasurable feeling of her burgeoning bust was far eclipsed by the surreal bliss between her legs, but the psychological effect made her whole body tingle. How big would they get? Bigger than her brother's, surely? After all, he hadn't had any in the beginning, right?

Her eyes glued to her swelling boobs, she kept jacking herself mechanically, lust still building constantly. Soon, the sides of her boobs where wide enough for her arms to hit them with every upstroke, making the soft masses quiver. The feeling and the additional stimuli made her cocks lurch in her hands, a particularly strong burst of pre splattering on her belly. She intensified her movements, now stroking both hands up and down in parallel strokes as fast as she could, relishing in the jiggling the motions caused in her growing tits.

Soon, the sensations proved to much for her and her first twin-cocked orgasm crashed over her. Both her dicks spewed cum - neither as much as she had ejaculated with just one, but the amount seemed to vary between shots. She pointed the tips of her appendages towards her expanding bustline so the jizz coated her liberally and started to rub the slimy cum into her skin as soon as she was spent.

She was still growing and started playing with her nipples, tugging them, releasing them and luxuriating in the fact that with every second, she could pull them up further and they settled down higher. The stimulation soon made blood rush to her dicks again.