It was supposed to be Cass, but Steph messes with that plan.

Upon arriving at her apartment Babsy sneaks into her room and changes out of her uniform, putting it in the wash, but upon returning to her room afterwards she is surprised to see Steph sitting on her bed and waiting for her. Babsy blinks in surprise and closes the door before speaking up.

"Hey Steph, everything okay?"

"Actually, that is what I wanted to ask you, besides the obvious changes you have been acting a bit... off lately. Is something wrong?"

Babsy bites her lip and thinks about how to respond, this is a golden opportunity to seduce Steph, sure she was planning on going for Cass first, but she can start with Steph. Just thinking about seducing and corrupting her good friend is starting to turn her on. And with that, she decides on a course of action.

"There is another change besides the obvious ones, and it is quite...distracting."

"What change is that?"

"I think it is easiest to just show you."

With that Babsy takes off her pants and panties letting her cock pop out, already hard. Steph's mouth drops open as she stares at it, speechless, and unaware she has been inhaling pheromones since Babsy entered the room. Noticing how stunned Steph is Babsy speaks up again.

"As you can see, I now have a penis. It is...distracting, to say the least. It is almost always hard."

Steph licks her lips before speaking up finally.

"How did this happen? And how do you deal with this?"

"Same way my other changes did, not really sure about how. As for dealing, masturbation helps with the hardness, a bit, and feels soooo good."

Steph lets out an awkward breathy laugh at that.

"Not sure I needed to know that Babs." After saying this Steph swallows, once again staring at Babsy's dick.

"Maybe not, but you do seem interested in it, do you want to see how it feels to you?"

It takes a moment, but she does respond, sort of. "Wha? No, I mean, well, I don't think I should."

"Why not?" Babsy moves closer to Steph, standing right up against the bed, cock not far from Steph's face as she is sitting on the bed.

"Well, I, uhm. Okay." Licking her lips she slowly reaches out and grabs it, Babsy manages to hold back a moan at the contact. "It's warm, very warm." Without thinking about it Steph starts stroking Babsy's cock, not even noticing until Babsy lets out a moan, no longer able to hold it back. At this point, both of them are breathing rather heavily. Steph starts to look up at Babsy at the moan, but her eyes are quickly drawn back to her cock as precum starts to leak out the tip. For a moment Steph just stares, but then she slowly leans forward, the pheromones have affected her enough that she cannot resist tasting it. Licking it up her eyes close as she savors the taste, before she knows it she has Babsy's cock in her mouth. Babsy lets out a loud moan and does her best to resist thrusting into Steph's throat thinking that might be too much too fast, instead, she lets Steph set the pace of the blowjob as she stands next to the bed with Steph now sitting on the edge as she sucks her off.

Babsy throws her head back as she moans again, Steph is bobbing her head up and down while using her tongue to taste all of Babsy's cock. Babsy can no longer hold back and she starts to thrust, luckily Steph is far gone enough to enjoy that. Before too long Babsy cums down Steph's throat, Steph makes sure to let none of it go to waste, which is difficult because the feeling of Babsy cumming in her mouth triggers Steph's own orgasm. And the first changes begin, with her ass getting bigger and her tits growing a bit too, she barely notices though, lost in the pleasure and lust.

Once her orgasm is done Babsy pulls out of Steph's mouth with a pop, a string of drool and cum connect them until it breaks. Breaking out of the daze Steph leans forward wanting to taste more of that cock, Babsy puts a hand on her head to get her attention.

"Steffi, I mean Steph, I have a better idea of what we can do, something even more fun than that, take off your clothes."

Steph barely notices the nickname, and is quick to obey as the two strip off their clothes, without prompting Steph turns around and gets on her hands and knees, and shakes her ass enticingly while looking over her shoulder with a smirk.

"This is what you want right? I noticed you checking out our asses as we trained. Only makes sense you would want to fuck me doggy style so you can see my ass that you love so much."

Babsy smirks and gives Steph's ass a smack causing her to let out a surprised squeak of pleasure, then she moves in and puts her cock at her entrance. She is feeling rather dominant and decides to act on that.

"I want you to beg me to fuck you."

Steph's eyes widen at that, and she hesitates not wanting to give in, but she is far too horny to wait long.

"Please fuck me. Please shove your cock into my tight, wet, pussy. I need it."

Babsy's smirk grows and then she thrusts into Steph who yells out in pleasure. Babsy starts thrusting into her and Steph soon loses the ability to think, her arms give in causing her face to fall into the bead as she drools with her mouth open and tongue hanging out, lost to the pleasure, moaning wantonly. Babsy meanwhile is still in control as she fucks her friend into the bed, thinking of how she can change her, corrupt her. Finally, she cums inside Steph who moans loudly as she cums once more, having long since lost count of her orgasms. Her assets grow and her mind is altered. Babsy has always felt Steph had the traits of a dog, friendly and fiercely loyal. Her mind should change to be more like one, becoming a true pet for Mistress. This is only the beginning of such a change, her own change was a slow one after all.