She heard what you said in the mirror

You walk into the living room, adjusting the waistband of your pants a bit as you walk. You still aren't entirely used to all of the jiggling your new body does when you walk, and the fact that you don't know how long you'll have to put up with it just makes you more self-conscious. Erica on the other hand looks like she's having the time of her life, a shit-eating grin on her face as she lounges back on the couch with her controller in hand.

"Come on already, we don't have all day," she says, impatiently patting the couch cushion next to her where your controller is sitting.

"Sorry," you say in your new female voice, sitting down next to her, "I had some issues with clean-up."

"Oh you did, didn't you? I couldn't imagine what that could possibly be like," Erica says. You could hear the sarcasm dripping out of her voice.

You pick up your controller and sigh, "Okay, okay, I get it, you're still pissed. Look, I wasn't going to leave you like that. I was just having a bit of fun while testing the Ruby."

"And now I'm having my fun," Erica says, "Now let's play. Maybe it'll get your mind off of your new tits."

"Fine, fine," you say, selecting your character.

Surprising enough, Erica was right. Maneuvering your arms around your new chest was a tiny bit awkward, but once you got into the rhythm of the game it was like nothing changed at all. Even when you were trash-talking Erica, you barely noticed that your voice was any different. Pretty soon, you almost forgot entirely that you were now a girl with toilet paper stuffed down your pants.

Of course, that wouldn't last. It's around the fourth or fifth match that the illusion of normalcy is broken. The fight is really close, with both of you at low health. You were in the middle of your game-winning combo when Erica suddenly says, "So, is this how hard you want to fuck yourself?"

You instantly drop the combo, and Erica takes the opportunity to take out the rest of your health and finish you with a Fatality. Realizing what she did, your embarrassment momentarily gives way to anger, and you turn to her and say, "That was a dirty trick."

"Hey, I had to throw you off somehow," she says with a shrug, "Besides, I can't really blame you. I did a fantastic job on your body, right?"

Your face goes red with embarrassment, "Uh, well... yeah. Not that I want to stay a girl or anything, but yeah."

Erica laughs, "Oh, I heard. You rather be the guy fucking a girl like you than the girl herself... 'Course, you don't really know what it's like to have a dick inside you yet, do you?"

Uh oh, that glint in her eye was not something you wanted to see while she had control of the Ruby. You give her a wary look and say, "Erica... what are you doing?"

It takes a couple more seconds before she responds, and when she does, it's with a confused, "Huh? Sorry, I was talking over you."

Yup, not good at all.

"What did you just change?" you say, before suddenly feeling something VERY weird going on in your nether-regions.

"See for yourself," she says with a devilish smile.

The feeling in your pants was getting worse, so throwing modesty to the wayside you stand up and yank down your pants, letting the now sopping wet clump of toilet paper fall onto the floor.

"Oh gross, dude," Erica says, looking at the mass on the floor, "You are so cleaning that up when you're done changing."

You're only half-listening though, as most of your attention is on your crotch. The area just above what you assume is your clit was rapidly growing a familiar looking shaft. However something about it doesn't look right, and it takes you a second to figure it out: your penis is coming in upside-down, and with no balls.

"What the hell?" you exclaim.

"Wait for it," Erica says in anticipation.

"Wait for wha-" you start to say, before realizing what was about to happen. Your restored dick was completely erect, but with the way it was oriented and slightly bending inwards, the head of it was about to go right into your new vagina. You barely have time to let out a scream before you penetrate yourself, the dick plunging deeper into your pussy as it continues to grow back to its full size.

"That," Erica replies, "Feels pretty good, right?"

The feeling is pleasurable, but at the moment you're too shocked to really enjoy it. You feel the penis grow some more, then slow down and stop a few inches into your slit. You wrap your hands around the shaft and try to pull it out, but you can only move it slightly before the new dick starts to hurt.

"Don't bother, I made sure it'd be lodged in that pretty good," your friend tells you, "You'll be fucking yourself constantly from now on. But hey, on the upside, your vagina doesn't lube itself up with semen anymore. You're welcome."

"Yeah, wonderful," you say sarcastically, "Seriously, this is just... bizarre."

"Hey, I'm only giving you what you wanted," she says with a shrug, before gesturing to the clump of toilet paper on the floor "Now, about that... thing. I ain't touching your cum."

"Alright, alright," you say with exasperation, and crouch down to pick it up. An action you instantly regret, as when you do, the dick pushes further into your vagina.

"Something wrong?" Erica asks with a snicker as you stay bent over.

"N-No," you say, unintentionally letting out a slight whimper. You pick up the offending wad, then slowly stand back up, which causes the dick to pull back out. You tighten your jaw and barely manage to stifle back a moan.

"Oh, one more thing," Erica says, that shit-eating grin from before back on her face, "I may have increased the sensitivity of your female parts just a tiny bit. Enough to make sure that's what you'll be feeling most."

"Gee, thanks," you say, much breathier than you intended.

"Now throw that shit in the toilet and get back here," she commands, "Oh, and pull up your pants. I don't need to see your dick all day."

"All day?" you exclaim.

"Hey, with an attitude like that, I might just leave you like this for even longer," she scolds, "Now get moving."

You sigh, knowing that arguing with Erica was pointless. You're really starting to regret giving her the Ruby now. You pull up your pants again, then turn and start walking towards the bathroom. Almost instantly, you notice a problem. You aren't sure whether it's the way you walk now or something else Erica changed without telling you, but every step you take causes your dick to pump into your vagina ever so slightly. Not as much as when you were crouching, but just enough for you to notice. By the time you make it to the toilet, your breathing had become ragged, and you have to take a moment after flushing to just stand at the counter and recompose yourself.

Okay, no more talking to myself where Erica can hear me, you think, looking into the mirror at your flustered female self, The last thing she needs is more ideas.

Still, you can't just sit idly by and let her keep changing you like this, can you? Sure, you may have taken things a bit too far with her earlier, but this was on a whole other level. And from what Erica has told you, she had no intention of giving up the Ruby anytime soon. Thinking to yourself about what your next move should be, you slowly walk back to the living room, doing your best to avoid cumming into your own pussy. Before you even make it back to the couch though, you get weak in the knees and stumble, causing a particularly hard thrust.

"You okay there?" Erica asks.

"I'm... I'm fine," you say, your voice noticeably higher than it was before. Still, you manage to maintain yourself until you sit down, at which point your dick hits something inside your vagina that sends a shudder through your body, and a slight wetness in your pants.

"Are you sure?" Erica says, "You're looking pretty close to going over the edge there. If you need to bounce around a bit and finish yourself off before our next match, I won't mind. Long as you clean up afterwords, of course."

Damn, that sounded really tempting. Plus, it was clear that she wanted you to **** yourself in front of her. That being said, would it be better to give her that satisfaction, or try to hold back? Defying her might not go well, but on the other hand it might give you a way to convince her enough is enough. Or even better, give you an opening to somehow get the Ruby back. Even though you can't see it, you know it's around her neck, and while you aren't sure just how much you can interact with it in this state, you might be able to get it off her if you're quick enough. Of course, if you fail...

Gah, it wasn't easy to think things through when you were horny as hell. Maybe you should just fuck yourself silly, then figure out a way to get the Ruby back.