Get really fucking excited, that's what

Tera took a deep breath, then gushed all at once, "Did it work? What are the results? Why haven't you started trying to have sex with everyone here yet?"

"Deep breaths, Tera," she tried to calm her assistant. "And one question at a time."

"Why aren't you trying to have sex with everyone?"

"I think it's a side effect of one of the modifications I made. I'm quite in control of myself, but I need to assume I'm contagious, and I have no idea what will happen to someone I infect."

"Are you sure it worked?"

"Yes. I haven't tested myself with the system, since… I don't want to end up in a containment cell. But yes, I'm sure it worked."

"What can you do?"

"Well, I can control my body, change it. Like the Alphas can. Maybe more than they can, actually."

Tera smiled. "Prove it."

Sarah glanced at the door, then unbuttoned the top three buttons of her blouse. Her breasts eagerly—at least, that's how Sarah felt—returned to their larger size.

"That's all you can do?"

Sarah didn't even hesitate to drop her pants and let her cock slither out for Tera.

Tera licked her lips.

'Oh.' Sarah reached down and pushed the curved shaft down so that at pointed outward, and waved it back and forth. "See something you like?"

"That's… that's fucking incredible. And weird." Tera frowned, "Don't you have balls?"

"That's what's bothering you the most?" Sarah laughed.

"Yes."

Sarah focused, and a lump formed at the base of her dick. Slowly it started to grow and split, until a pair of smooth hairless balls, each the size of an egg, hung from the base of her dick. "Better?"

"Much," Tera giggled. "Even if it is entirely too big."

"It's small compared to some Infected," Sarah pointed out.

"Touché. Do you still have a vagina?"

Sarah attempted to lift her balls for Tera.

"I can't see anything like that," Tera smiled, "Why don't you sit down and spread your legs for me?"

Sarah obliged and Tera got down on her knees, ostensibly to look, and pushed two fingers into Sarah, who gasped in surprise and pleasure. "Hmm, seems to be wet and functional. It does seem a little stretchier than I remember." She pushed her fingers into a wedge and pushed her whole hand into Sarah easily. Sarah's eyes went wide, and a feral grunt escaped her lips as an orgasm rocked her whole body. "Yup, that seems to be working, I wonder how far I can get in here," Tera started pushing her arm into Sarah until she was elbow-deep, giving Sarah another quaking orgasm. "I wonder if this one works," she smiled as she reached out her other hand to take Sarah's massive cock. Pre-cum was drooling from the tip, and Tera quickly rubbed it all over the shaft and head.

"Oh shit Tera," Sarah moaned.

Tera took her hand out of Sarah, and put both hands on the huge member. "It seems like it feels good, but the most important question is, can you cum?" she smirked. She began to stroke Sarah quickly, skipping the foreplay and going straight for the finale. Sarah groaned in appreciation, and Tera picked up the pace some more.

"Yeah, Tera, oh, yeah."

Tera put her lips on Sarah's cock–there was no way she could get it in her mouth–and put her tongue against the tip.

Sarah lost control then, she grabbed Tera's face and tried to push her cock into the other woman's mouth. "Fuck yes, yes. Oh, keep going, I'm gonna…. I'm… cumming!" she shouted as muscles in her groin she'd never felt before clinched tight and hot pleasure radiated in her crotch. She held Tera down as load after load of cum pumped out of her length into the poor blonde's mouth. Sarah had no idea how many loads she shot out, but it was far more than any man she'd ever been with had.

"I'm sorry Tera," she said, "I don't know what—"

"Fuck, that was hot," Tera smiled, licking cum off her face. "I mean, lesbian sex with you is hot, but that… Yeah."

"And you're infected," Sarah suddenly remembered.

"Yeah," Tera shrugged. "It's like you said right? If you can't beat 'em, join 'em?" She hesitated, then took off her shirt. "How do you make your tits grow?"

"I don't know," Sarah admitted, "I just kinda focus on them and form a picture of what I want them to look like."

Tera nodded, then smiled as her breasts grew from their pleasant C cups to a D, then E, then F, and kept going until each one was the size of a basketball. "Want a titty fuck?" She smiled deviously at Sarah, and, without waiting for an answer, leaned forward and buried Sarah's massive cock in between her own massive breasts.

Sarah groaned with pleasure; Tera's breasts were both incredibly soft and perfectly firm at the same time, and felt absolutely wonderful. Tera slipped the head of Sarah's cock into her mouth, which now easily stretched to accommodate the massive tool. She bobbed up and down on it quickly, pushing as much of it down into her throat as the angle allowed. Sarah groaned and grabbed her own tits, kneading them and squeezing them as the pleasure washed over her.

"Ugggh. Tera, you're so—uggggh—so good at that."

Tera stood up then. "I can't wait anymore. I need you inside me right now." She lowered herself onto Sarah without any hesitation, her sloppy wet sex greedily swallowing down all Sarah could offer. "Ohhhh yeah, Sarah. Your cock is the absolute best." She pressed her breasts against Sarah's face, and started to rock back and forth. The pleasure was intense. Sarah nearly came when Tera got on her, and it took barely any rocking for her balls to tighten again and shoot her second load deep into Tera. Tera moaned, but didn't stop, instead, she started going faster. Sarah grabbed her ass and stood up, putting her assistant down on the table, and began thrusting in and out with reckless abandon. Both of them were struggling not to start screaming, the pleasure was so intense. Sarah's cock sliding in and out, in and out, in and out. Tera's huge breasts bouncing, Sarah's too. She felt her balls swell–if she could have seen them she would have compared them to a pair of cantaloupes.

"Tera, I'm going to cum."

"Fuck, me too. Cum in me again."

"Cum with me," Sarah ordered.

She picked up her pace, hammering Tera's pussy with all the **** she could. She just kept going, the orgasm building and building. Tera below her was hysterical, rubbing her clit with one hand as fast as she could and crushing her breast with the other. Sarah felt it break, the biggest and most intense orgasm she'd ever had broke loose. Her cum shot out into Tera's pussy. Load after hot load shot out of Sarah, but not a single drop leaked out of Tera, her belly just swelled like she was pregnant with twins. At the same instant Sarah started squirting, Tera's whole body contracted and shook, and a long low groan escaped her lips.

Sarah finally felt sated, and she slumped back in her chair.

"Shit Tera, that was amazing."

Tera groaned, "I couldn't cum."

"What?" Sarah asked.

"I was ready to cum. I wanted to cum, but I couldn't. I physically couldn't, not until you started cumming. And then… fuck, it was good."

"I guess you're my Beta then? Since I can order you around? I wonder what else I can do? Hmmm… Make your breasts their original size."

Sarah watched as Tera's breasts shrunk back down to C cups.

"Damn, I guess I'm going to be at your mercy forever," Tera giggled.

"Good thing I don't really get off on that."

"What's next?" Tera asked eagerly.

"Cleanup," Sarah smiled.

Once they were reasonably sure that everything was clean, particularly that they hadn't left any infected fluids around, they sat down and Tera asked again, "So, what do we do next? Escape?"

"No," Sarah said slowly, "I don't think so. It would draw a lot of attention. My sister is still on her way here I think. And…and we should take control of the facility."

"Infect everyone?" Tera smiled. "That sounds fun, and dangerous."

"I know, but the people most likely to stop us are here. If we can turn them and have them on our side, there's nothing anyone can do to stop us."

Tera giggled, "How do we start?"