The thin, spindly finger of the first inch entered her anus first, pushing inside of her painfully as her sore hole struggled to accept the living violations. Two of the same oblong ends pushed against her lips, entering her pussy at the same time until one overpowered the other, sliding into Trisha completely, filling up her cunt with every inch of alien cock.
The ones watching her stopped their audible conversation, sharing telepathically in the ravishing done by their counterparts. As the blonde girls stood watching their friend, the tentacles pleasured themselves like springs, coiling and uncoiling inside of their victims. It would continue this way, the aliens using their terrible powers to maintain that straight-faced modicum of control as they ravaged their prey in plain sight.
Tricia was still there, just barely, her body beginning to betray her. The things wriggled and worked inside of her, jiggling just right to bring her towards the beginning orgasm. These climaxes were almost constant once the creatures inserted themselves, a way of keeping her compliant over the past few days.
But still Trisha fought against them, keeping her neck above the water even as they tried to bend her down. It was a small victory, a second's delay before the inevitable. She could feel the ridges and suction cups inside, tickling each canal as they slid and slunk up and down, repeating the same patterns of pleasure until she pulsed, overcome by another orgasm that despite her disgust, always erupted into a state of unequalled ecstasy.
By the time she stopped shaking, the creatures had exerted themselves again, keeping her mind locked inside as they devoured her. They lowered her head into the water, another tentacle swimming into her mouth, wrenched open by the aliens. It used her as easily as the ones below the water, each driving in and out until again Trisha surrendered the continual torment of disembodied tentacles.
They spasmed, simultaneously shooting their loads before being replaced by the next group of swimming phalluses. She lost track of the times that she was penetrated, unable to resist anymore as the monsters used her as much as possible, taking her nearly to the breaking point to satisfy each successive group of tentacle cocks.
Trisha leaked cum into the water from each hole, but the worst was tasting the semen in her mouth, gagged up from her throat. She sputtered at times, the aliens only barely letting her breathe. They knew exactly the limits of her body, stopping only when they were sure she truly could not take another second of monstorous sex.
There was another chance, a moment when the creatures let the water rinse out the cum from Trisha's anus and pussy when the girl regained control.
Only she didn't fight...
The last two inserted themselves into Trisha's anus and pussy, lodging themselves inside of her and molding to fill her perfectly.
Alien cum leaked down into the panties of both blonde women as they waded into the knee-high water, the tentacles inside of them pumping the two of them full during spawning. They bent down, untying the girl and helping her up.
"It is your turn to trade," the one called Trisha said, rising from the water.
"I am reluctant to leave," the one called Tanya replied.