Duck into the next cabin

Alice scrambled towards the cabin door. Being at the back was fortuitous, as some of the other occupants had already escaped to the next car.

She rushed in, just in time before any of the slugs could reach her.

"Bang!" The car door slammed shut, crushing some of the slugs into a gooey pulp.

She could only stare in horror at the scene behind her.

***

The previous occupants were now all desperately flailing and kicking about, the slugs descending upon them like a horde. They attempted to invade every orifice, some latching onto the occupants' faces, while other were wriggling their way into the private parts.

A woman, only a few steps away from Alice just now, slumped against the glass pane.

"Please.... help..." she panted heavily.

Alice could see the slug squirrel away into her snatch.

That was when a shadow loomed over her.

He was now about half a feet taller, face covered with blue rubber. The slugs on his nipples had transformed into dick nipples, leaking blue ichor, the rest of his chest only the shredded remains of the business shirt he wore. His lower half was bare naked, torn by his now large blue dick and balls. A tentacle sprouted from his ass, fixing itself to the floor to counterbalance the frontal weight.

"AIEEEEEE!" The infected rammed its dick into her pussy, wet pre-cum already dripping to the floor.

"Stttooooopppp! It hurts! It hurts!!"

BANG! BANG! BANG! The train door rang as the infected pounded the poor woman, her breasts and cheeks slamming against the glass pane. That was until she began swelling. Her belly ballooned into a round blue ball while her breasts also inflated, leaking blue goo against the glass. dark blue veins travelled around her body and up to her veins. Her pink tongue had also stretched into an alien bluish form. Her shocked and panic expression had twisted into a wide smile, as the pleasure from the infected's cock overwhelmed her.

"CUMMING!" Torrent of blue goo poured into her and out of her mouth all over the train window. Before her eyes rolled back, and she collapsed like a sack of potatoes onto the floor.

The infected dropped the woman, and seemed to be looking at us, eyeing us like it was our next meal.

Luckily someone rushed forward, a piece of wet paper in hand to cover the glass door, obscuring the infected from sight.

Alice collapsed to the floor, panting in exhaustion.