Chris helps Emily produce a semen sample

After confessing their mutual feelings, Chris and Emily can't get enough of each other. They putter around the lab together, making eyes and flirting. It's nearly lunchtime before they get any actual work done.

"It looks like we need a new semen sample, would you like to help me collect one Chrissy?" Emily asks, using her new pet-name.

Chris blushes enthusiastically. "You bet. How should I help?" She asks demurely.

"You can start by taking off your clothes." Emily suggests, already feeling herself getting hard at the thought.

"Like this?" Chris asks, slipping out of her blouse and skirt. She's left wearing nothing but her bra and panties.

"Mm, that's perfect." Emily says, her eyes roving Chrissy's body hungrily.

"Anything else I can do for you?" Chris asks sweetly, posing casually against the table behind her.

Emily pauses for a moment, feeling nervous. "Would it be too forward to ask for a blowjob?" She asks at last.

Chris lets out a little giggle. "Not at all, I'd love to." She reassures Emily.

"Oh good, I've always wondered what it feels like." Emily says bashfully as she starts to undress. Her dick springs free from her tight clothes, quickly swelling to its full erect size.

"Wow, it's even larger than I remember." Chris says, admiring her lover's cock.

"I hope it's not too much for you." Emily says, feeling a little self conscious of its continued growth.

"Not at all." Chris assures her, eagerly dropping to her knees. "The bigger the better." She gently wraps her lips around Emily's member, sucking lightly at the tip as she works it deeper into her mouth.

"Whoa... Chrissy, that feels amazing." Emily sighs happily. "It's even better than I imagined."

"I used to adore blowjobs." Chrissy says between sucks. "It's kind of funny, after having a pussy for over a year I can hardly recall what they felt like anymore, but giving one to you helps me remember." She says quickly before going back for more.

"Mm, this might be the best thing I've ever felt." Emily sighs, leaning against a wall for support. "Your mouth is so warm and lovely. And it's so hot to feel myself entering you, pushing past your lips." Emily shudders with pleasure. She begins to play with one of her own nipples, pinching and toying with it while Chrissy sucks her off.

Chrissy nods slightly, focusing on taking Emily's dick deeper into her mouth. She grips her shaft with one hand, stroking it while she bobs her head. Her other hand reaches around to Emily's ass, helping to coordinate her lover's hip movements with Chrissy's head.

Without giving any warning Emily begins ejaculating. "Oh shit, I'm so sorry." She groans mid-climax. The first spurt goes down Chrissy's throat, but then she pulls away in surprise, letting the cock slide from her mouth.

"Guh?" Chrissy chokes out, scrambling for the sample container. The next spurt hits her square on the lips. She catches a few more bursts of cum in her face and hair before she manages to capture the last squirt in the test tube.

"Are you alright?" Emily asks, taking the sample from Chrissy who is looking up with her face completely splattered by Emily's load.

"Yeah, don't worry about it, I-" Chrissy stops talking, getting a glassy look in her eyes. "I-" She tries again, but her voice fails her, coming out strained and hoarse. She feels the tingles of a new transformation coming on.

"Oh wow, your face." Emily says, watching stunned as Chrissy's face shifts and changes before her eyes. Chrissy begins to tremble and gyrate. "Do you need the painkiller?" Emily asks with concern.

Chrissy shakes her head, then gives two thumbs up to show she's fine. Soon after she tips forward, supporting herself on her hands and knees while she squirms in pleasure. As the transformation reaches its conclusion her voice starts to come back, now high and feminine. "Holy fuck..." She moans in climax with her new voice. As she cums her hair begins to rapidly grow out, reaching well past her shoulders by the time her orgasm fades.

Emily's concern gives way to amusement as it becomes clear Chrissy is having a good time. "It's so hot when you transform like that." Emily says, idly playing with her still-hard cock.

Chrissy smiles up at her from the floor, her face obscured behind a curtain of hair. "You like that, huh?" Her voice rings out clear and girly.

Emily helps Chrissy to her feet and brushes the hair from her face. "Chrissy..." She says, dumbfounded by the changes. "You're gorgeous!" She stammers.

Chrissy's freshly reformed cheeks blush. "Let me see." She says, reaching for a mirror. She still has a resemblance to her former face, but every trace of masculinity has been removed. It's almost like she's looking at the face of a long lost sister. "Is that really me?" She asks in shock, looking one way and then the other.

"Yep." Emily confirms. "I thought you were pretty before, but now- you could be an actress or a model or something with a face like that." She enthuses, causing Chrissy to blush all the more.