They get everyone they can infect and made their way to the central station

Rebecca was pleased with her crew of infected passengers. At every stop they pass throughout their ride, the new passengers were infected in seconds by warmed up men firing their cum at them or submissive women who drew them into their orgies. After five stops, the train was jam-packed with men and women who fucked themselves into endless orgasms and a cacophony of voices that moaned and groaned, sometimes even drowned the noises of the train.

Rebecca didn’t leave her position over Violet's face, occasionally sucking a cock when a man was spurting his cum over the many bodies filling the train. But in all the time, she didn't loose track of the display that showed her that the train was getting closer and closer to the central station. At the last stop before it, she stood up and left the moaning Violet alone with her cock. She moved around the many men and women who fucked in countless positions as she walked to the driver's cabin.

Brandon was still in there with Kira. The black girl's face was painted in cum and she was sucking on Brandon's large member, its hot juice splattered across the entire cabin.

“Seems like you are keeping your promises,” Rebecca said, smirking.

“Ah, my sweet blonde demon-lady,” Brandon said and winked at her while Kira was slurping loudly at his tip. “How are things out there?”

“As I suspected, everyone is fucking and enjoying the joy of orgasm,” Rebecca said and watched as Brandon shot another load in Kira's face. “I won’t need your driving skills after we reached the central station. Just make sure to go out there and share your cum a bit.”

“I will absolutely do that,” Brandon said.

“Wonderful,” Rebecca said and grabbed Kira's head, kissing her sperm-smeared mouth, enjoying the taste of Brandon's cum once more.

Sue had been fucked by at least ten different men and three futas, all a product of Carolina’s cum, but she wasn’t blind and indifferent to all the others. She watched Rebecca walk to the cabin.

_'Shouldn’t last long now,' _she thought to herself while the man behind her thrust his cock up her ass once more, 'but where the hell is my sister?'

She let the man finish his work and moaned with satisfaction as his load spurted all over her back, but before he could get to fucking her again, she slipped away between Carolina and Ben, who shared one of the new women. She looked for her sister and after a few seconds, she saw the little bat-wings. Jess was being eaten out by a man who was getting a double-blowjob from two women kneeling before him. Sue’s sister was sitting on his shoulders and encouraged him loudly. “Fucking eat me. Use that tongue! I want it as deep as your cock!”

“Hey Jess,” Sue said casually as she reached the quartet. “How are things up there?”

“Oh, hi, sis,” Jess said and smiled at her. “You wanna join?”

“I think I’m good right now,” Sue said, even though her tail was creeping away and stroked the pussy of a woman who got facefucked by a blonde futa.

“Can’t say that about meeee!” Jess panted, gasping her next orgasm. “I want a turn with that sexy tail, if you have nothing to fuck right now.”

“We surely arrive soon at our destination,” Sue replied enjoying the feeling her tail was giving her. “I want to have something in reserve for when we get there.”

“You just speak for yourself, Sue,” Jess replied and jumped off the man's shoulders, who turned his attention to the other women at his cock. “In my case, I can’t get enough of this. It’s like I can never be satisfied.”

“You always were difficult,” Sue said smirking.

“Difficult, maybe. But I never felt this good before,” Jess said and started caress Sue's tits and stroking her clit.

“Agreed on that point,” Sue said and touched her sister's tits as well.

Rebecca appeared at the door of the driver's cabin and both of the girls waved at her. She noticed that and made her way to them. As soon as her blonde friend reached them, Sue’s tail pulled her to them and all three of the girls started to touch each other's tits, their clits, and, of course, their wings and, in Sue’s case, tail.

“We’ll arrive soon,” Rebecca said and kissed Jess neck. “I hope you guys are ready?”

“Of course,” Jess said.

“Any specifics how we proceed?” Sue asked.

“Infect everyone we can reach,” Rebecca said smirking. “Shouldn’t be that much of a problem. We have at least forty men and women ready to spread without any resistance. Plus, the horde is probably on it’s way.”

“The horde?” Jess asked frowning.

“The rest of our army,” Rebecca explained smiling. “Our master's army.”

“So we need to hurry a bit, before they can get all of the cake?” Jess said and gave Sue a knowing look.

“Don’t you worry, we’ll have plenty people to infect after we got the central station,” Sue said and Rebecca nodded.

“Any plans yet, Sue?” she asked. “Any places you have in mind?”

“A few,” Sue answered and thought about her friends at college, her cheerleading team, her teachers. “I’ll find some friends. Old and new.”

“Me too,” Jess said eagerly. “Mom and Dad still need to meet the new me, right?”

“Oh yeah, I bet they love you now even more," Sue said with a knowing grin, then she eyed Rebecca. "What about you, Beccy? Any plans?”

“A few,” Rebecca said with a mysterious smile.

Sue wanted to ask what plans exactly, but the train slowed its speed again and the three friends looked at each other smiling, but determined.

“Have fun guys,” Rebecca said. “I’ll find you if I need you.”

The train stopped and the voice of Brandon rang out through the speakers. “We arrived at the central station. A pleasure to be your driver and I hope we meet again soon.”

Sue, Jess and Rebecca kissed each other one last time before the doors opened and they rushed forward, followed by the infected pack of naked men and women, ready to infect more people.

The story splits up from here on:

Rebecca's part is the shortest and will lead you to the main-story/branch.

Sue's and Jess story will each go on their own with several little branches during their journey until they meet again eventually. Nearly every side-branch will lead to the story of Sue and Jess back again.