Help Gwen to accept her changes

While Gwen was still in the process of waking up with stifled yawns, you could barely contain your giggling. She was none the wiser about the way you practically drained the contents of her testicles straight into your new pussy, and now kept them there - warm and snugly packed away inside your cunt. The only thing that may still give it away was the way you were **** to walk rather... awkwardly. The tampon's presence was hard to ignore. No wonder, most girls have years upon years of experience with that sensation. They probably don't even notice having anything wedged up there. But you certainly do...

"M-mornin'..." comes the tired voice of your sibling, who made an effort to sit upright while her bed angrily creaked in response to the shifting movement.

"Good morning, nice dreams?" You sit down by her desk to try and hide the way you were squirming around. Hardly an issue, since you have to endure it only until your sister's seed ensured that you're knocked up.

"Dunno... there's no troublesome morning stiffy today, so that's good at least," she chirped happily.

Again you smirk. She had no idea about why she didn't have her morning erection. If everything goes well, she will never find out. "Aw come on, having a dick isn't all that bad," you try to convince her, but she was having none of it and simply shook her head with an annoyed expression. Bummer... if you don't find a way to get her on your side, she will just cause more problems in the future. Not to mention she will probably question how you got pregnant in the first place... assuming her stubborn seed will take root in your belly.

Hatching a plan, you make a quick trip to the bathroom's medicine cabinet and grab a little package of blue pills - your dad's stash of Viagra. At least today, he's gonna have to share that stuff. You retrieve one of the pills and grind it down into a fine powder before sprinkling it into a glass of water and returning towards Gwen's bedroom... but why not be safe rather than sorry? You quickly get back to the bathroom and add another finely grounded pill to the water before getting back to your sister. She was still half-asleep on the bed when you arrive, and it was child's play to make her drink the refreshing water without a second thought. Hell, she even thanked you for being a generous, caring "brother".

She's still clinging to the hope that everything will return to normal again. Two blue pills should be enough to give her a raging hard-on to stroke and enjoy for hours, and if she enjoys an afternoon of self-pleasure even half as much as you do, she'll be hooked on having a cock attached to her crotch.

The next hour passes uneventfully, until you hear some commotion in the hallway followed by a sudden bang as the bathroom door shuts. Since you were alone by the computer, you decide to investigate what's going on and knock on the bathroom door.

"Go away!" Gwen immediately answers with a ****, helpless tone in her voice.

"Come on, let me inside." There's some shifting and stumbling behind the door, but soon enough it opens up and you see a naked Gwen standing there with a pile of clothes on the ground, and her dick... standing painfully erect! Even in the brief second you spend looking at it, it's already bouncing and throbbing with an angry red surface that begged for attention. The kind of attention that Gwen probably didn't want to offer. Looks like your plan backfired slightly. Instead of furiously masturbating her girl-dick and falling in love with how easy it is to climax, she simply refused touching herself!? This sure wasn't the way to make her appreciate the extra-appendage...

"Get in then, fast! Before dad sees anything!" she ushers you in and quickly closes the door behind you to lock it. "The stupid thing randomly started getting hard again, but even after... you know... taking care of business, it didn't go soft! I've got no idea what's going on and it's stressing me out!"

"Relax. If jerking off didn't help, maybe you just need some different kind of stimulation?" You immediately regret making that kind of suggestion. Here you are, stuck in the bathroom with your sister, whose sperm was still securely kept inside your cunt. If she finds out, you're screwed. Even now you can feel some of the gooey fluid leaking past the tampon and getting your panties wet... or is that your doing?

"What do you suggest, then?" Gwen's soft voice sounded slightly impatient.