Tyler crept into Mrs Paulson's house. The lights were off. Strange. Then, the door slammed behind her. She heard it lock.
Tyler turned, fear building in her chest as a figure stepped out. They towered over her diminutive 5'3 by a whole two feet. The 7-foot beast walked forward, and Tyler could see the huge amount of muscle and hair that adorned them - like a bodybuilder, only bigger. "Look what the cat dragged in," they said, in a deep, booming voice. "A perfect little slut, just for me."
"W-who are you?" Tyler stammered. She took a step back and found herself cornered against the wall. Suddenly, the lights flickered on.
"Relax, it's just me," the creature reassured. Tyler stared up at them in disbelief.
"Eileen?"
"Yup," the beast grinned, showing sharpened fangs in their canine muzzle. Two pointy ears sat atop their head, and a tail wagged behind their back. Eileen, the huge wolf anthro, grabbed Tyler like she weighed nothing and brought her against her lips. "I guess you can call me Eirwyn, now."
Tyler was speechless. "But you- and I- ...How?"
Eirwyn shrugged. "I think that when I ingested your cum, you gave me some of your powers accidentally! Now I can change myself and some stuff around me. Though, maybe, deep down you just really wanted me to be powerful..."
He shrugged again and placed a paw on his crotch. Tyler's eyes were drawn to his huge sheath and melon-sized balls. "Either way, I think we should have some fun, don't you?"
Tyler looks Eirwyn up and down and feels a flush of heat running to both her cheeks and her nether regions. "Umm, yeah," she mutters shyly. "You're really hot, Eirwyn."
"Not too bad yourself," the wolf replies. "But look, Ty, if you're not quite comfortable just yet, we can always find some other fun activities to do..."