Possess more passengers and crew

Hannah yawned as she climbed up the narrow stairs to a bed that awaited her. She shook her jet black hair from her bun, allowing it to flow down her shoulders, preparing for some much needed rest. After nearly 6 hours of standing and serving, Hannah was exhausted, and as such, didn't notice the 2 figures in the room with her. She took off her uniform, leaving on only her underwear and a bra to match. She barely had time to lay down when she felt a unnaturally strong hand slapped over her mouth, before she had a chance to react or scream. Hannah only just registered the presence of her coworker, Nicole, who looked at her with what only could be described as primal lust.

"Going to sleep so soon Hannah? There's still soooo many people here who need our help. It would be rude to simply leave them...unattended.", Nicole spoke.

"I still can't figure out why there aren't more of us among you. Maybe you can help with that." said Lisa, emerging from the shadows as well, sharing the same look as Nicole.

Hannah could only look on in confusion and fear as Lisa slowly approached her, arm outstretched, dripping with a black substance that quickly took on its own form and slithered towards the still-struggling form of Hannah. The dark blob quickly positioned itself between Hannah's legs and moved aside her underwear, ensuring her pussy was ready for entry. Then it dove in. Hannah experienced an overwhelming sense of ecstasy, pleasure, and simultaneous pain and discomfort as her body tried to reconcile what the alien was telling her as well as what her mind was attempting to defend itself from. Any resistance was futile, and Nicole knew that, drawing back and allowing Hannah's body to transform free of restraint. She and Lisa merely observed silently, watching as another body joined their ranks.

After a few minutes, Hannah rolled over and sat up, revealing eyes the same color as the figure which crawled inside her a few minutes before. "You're right Nicole." said Hannah in a professional voice. "We must service our customers to the best of our ability, in whatever they may require...even if they don't expect it." With that, Hannah redressed, buttoning up her shirt, putting on her blazer and scarf, pulled up her tights and skirt, slid back into her 3 inch pumps, finally rolling her hair back up into a tight bun, and in a few moments, she looked just like she had when she entered. Hannah then walked back down into the main cabin with her two companions, more alert than ever, ready to possess more humans.

Throughout the rest of the flight, they spread their essence into as many humans they could reach. The two flight attendants combined could fully possess a human through their drinks and food, repeating the same process Nicole had done to Lisa. The unsuspecting passenger would eat the food, go to the restroom, feel their body uselessly fighting against the invader that was now inside them, fall ****, and awake a changed man/woman. To the uninfected passengers, the only indication that something was different was that an unusual number of passengers were going to the bathroom. Nicole, Hannah, and all the newly infected passengers shared a knowing look each time they exited the bathroom.

Lisa had a more direct approach to her goals. As the isolated first class passengers slept, Lisa merely grabbed them, ensuring they couldn't speak or otherwise ask for help, and bonded with them directly, only letting go when she was sure they were under control.

When Flight 198 landed at Dubai International Airport at 11:36 local time, 4 flight attendants and 20 passengers, including everyone from first class, walked out of the plane...different.