The transformed Wildcats soon started to split off in search of prey. Nancy, being the MVP, felt that she could take down anything without help and was one of the first to strike out on her own. Her leonine nose twitched as she stalked into the suburban neighborhood. This was not where game was usually found, but she felt drawn here.
Before she knew it, she found herself before a house that looked familiar. She looked at it in confusion, wondering why she had come here. Eventually, her memory triggered and she realized she was at Sid's house. Sid was a boy she knew in school, one of the best players on the basketball team. Nancy had thought Sid was a sweet guy and a little cute. Though her simpler mindset was more concerned with how he seemed like an appropriate companion. With a small grin on her muzzle, she stalked around the house until she found the window into Sid's room. Fortunately, the house was only 1 story tall and it was easy for her to get her claws into the edges of the window and raise it up.
Sid was playing on his 3DS when he heard a sound. He looked up to see a lion girl coming through his window. She wasn't as big as a lioness could get, only being a few inches taller than him, though she did have lean toned muscles and her small breasts and hips were wrapped tight by her strained soccer uniform. She approached his bed on all fours, her tail lashing with interest. Sid saw the number on the back of her shirt and recognized her honey-colored ponytail. "Nancy? What happened to you?" he asked. The lion girl didn't respond, a hungry gleam in her eye. "What are you doing?" asked Sid nervously.
"I'm on the hunt," said Nancy, a soft growl in her voice. She jumped onto the bed next to him. She leaned close to Sid, sniffing him with interest.
"You don't want to...eat me..." said Sid nervously. His head was starting to swim a little, though it wasn't just from fear. Nancy's body still carried the Leo virus and even her breath expelled the contagious mutagen. Sid's auburn hair was starting to become thicker and longer. Tawny fur was starting to grow across his form.
"I don't want to eat you," purred Nancy, watching with approval as Sid's face started to push out into a muzzle, "I have...a different...hunger..." Her eyes went down to Sid's shorts. There was already a bulge in the front that was starting to get bigger. Her own shorts started to feel restrictive as a burning need filled her. She reached down and raked the front of Sid's shorts with her claws. The fabric tore easily, releasing Sid's boyhood which was already standing up tall and developing the soft nubs of a lion's member.
Sid moaned as he felt his member spring free. He could smell the want on Nancy and his simplifying mind was eager to respond. He unsheathed the new claws on his hand and ripped the shorts on Nancy. Nancy purred as her lower body was exposed, her pussy already dripping. Sid adjusted on his bed slightly, his new tail moving to the side as he completed his change into a young lion. "If you want it so bad, come and get it," he said with a soft growl.
Nancy was eager to accept Sid's invitation. She climbed over him before she started lowering herself. They both moaned as Sid's penis entered Nancy's pussy, the nubs on it stimulating her inner walls. It didn't take long for them to start moving against each other. That was when the virus's secondary program activated. The Leo virus might not be able to spread very far initially, so it was designed to not only promote the need for reproduction, but to make those who caught it more capable of producing offspring.
Nancy and Sid groaned as they continued to mate, their voices starting to deepen as their bodies began to grow. Their already firm muscle began to grow in size, getting even more definition. Their bare asses started to become rounder, adding additional padding for further mating. Their digitigrade legs started to slip over the side of Sid's bed as they grew longer. Their groaning turned to grunts of discomfort as their shirts started getting tighter. Sid's torso was doubling in size with muscle as Nancy's breasts became even more constricted as they swelled into large globes. They were so focused on their mating, they didn't stop to tear off their shirts. Fortunately, the cotton soon gave way, exposing their growing torsos. Sid looked up with interest as Nancy's shirt revealed the large breasts forming on her chest. He leaned up and easily ripped away the remains of the shirt and the training bra. He cupped her mammaries in his paw-like hands before he put his muzzle to one nipple and started to suck it. Nancy moaned with pleasure as he ran her hands across Sid's back, feeling the thick muscle there as well as the auburn mane that had grown so thick.
Nancy and Sid's movement started to pick up speed, Nancy riding Sid's large cock with gusto. The moans and groans of the two sounded more bestial than human. The bed covers were being ripped up by the two's claws as they reached their peak. Finally, both of them gave a loud roar as Sid unloaded his lion seed deep into Nancy. The two of them slowly separated, lying next to each other on the partially-ruined bed. Anyone would see a pair of grown anthro lions lying there. Sid was an impressive beast with strong muscles, a thick auburn mane, and a sizeable set of leonine balls underneath a sheath that his large cock was retracting into. Nancy was a picture of beauty and strength, her curvy body and large breasts only slightly overshadowing her developed muscles. All that separated her from an actual lioness was the honey-colored ponytail on her head. Nancy leaned against Sid, purring as she felt the muscles of her mate. The Leo virus made them simpler of mind, but that didn't meant they were easily satisfied.