"You are always so bossy!", one of the males who had "fetched" the monster said to Purple. "You keep hogging the attention. Let the girl play with our monster. We can keep her occupied!"

And with that, the tree lowered it arm like branches, grabbed hold of Susan and hoisted her into the air.
The tree itself was obviously in the process of sprouting, for a lack of a better word. A green member, obviously shaped to resemble a penis, was growing from its midsection. It had the light green color of fresh plants, and was glistening with some sort of watery liquid oozing from tiny pores, possibly meant as some sort of lubrication.

Susan cried out in surprise as the tree lifted her up. She'd been expecting its attack, but had thought it would take her where she was; it hadn't looked stable enough to pick her up without losing its balance. Obviously, it's better balanced than I thought.

She got her first good look at the tree-monster's penis as it moved her into position. At least it isn't bark covered. That's something, at least.

The tree monster swayed a bit as it adjusted Susan's' position, but were in no real danger of tipping over. The pixies had made it fasten some of its roots in the ground, anchoring it.
It now held Susan face up, with her lower body facing the tree.

The two tentaclular branches grabbed hold of each of her legs, prying them apart, ripping the wreaths that served to bind her ankles.

The wooden member was now menacingly pointed towards her pussy, dripping with watery lubrication.

Susan tried to stop the tentacles from pulling her legs apart, but the tree's strength was far too much for her to resist.

As the wreaths broke, she flailed her legs as much as she could in a futile attempt to get the tree to drop her, or fall over, or something. Anything that might give her a chance to get away.

The tree struggled a bit with holding Susan still, but managed to wrap its tentacles around her ankles. With slow, relentless strength, it forced her legs backwards. At the same time, it used its great "arms" to adjust Susan's position, while the pixies shouted encouragement and advice for how she should be positioned.

Susan did her best to resist the tree's efforts to position her. Its great strength combined with the flowers and tentacles binding her made her struggles futile, but she refused to give up without a fight.

"Let me go, you... stupid... oversized... weed!"

While at a disadvantage, Susan did actually prove herself to be a fierce opponent. Her fighting made her hard to position in such a way as to complete the planned violation. Her struggle with the "weed" cased her to swing back and forth. This had the additional effect of making her breast bounce and move in a delightful way, judging by the whistles and shouts of the airborne little devils.

A small body landed on Susan's head. "Weee! Back and forth! Up and down! Roller coaster!", shouted Yellow, clutching at Susan's hair to not fall off. Pink followed up on the idea, and landed on Susan's chest. She was positively soaked, glistening with Susan's sweet juices.

Meanwhile, the tree was getting closer to its objective. She was now in such a position that the wooden cock ground against the outsides of her pussy each time she moved.

"Ow! You little bitch! Let go! Ow!" Susan yelled as Yellow's grip on her hair resulted in sharp tugs when she tried to break free from the tree-monster.

"You too! Get off me!" she added as Pink landed on her chest. She tried to buck to dislodge the dripping pixie, but couldn't move enough to do more than unbalance her slightly.

As the tree's cock started to rub against her pussy, she increased her struggles in a desperate attempt to avoid the inevitable violation. Should have tried kicking it in the balls when I could. It probably wouldn't've worked, but you never know... Not that the tree actually had balls as such, but the corner of her mind not involved in her struggles was trying to avoid thinking about what was about to happen.

"Don't you want me here?" Pink asked, confusion on her face. "But I made your pussy happy!". She was struggling to keep herself in place on Susan's chest.
"Yeah! You might want to ease down, pretty." Yellow added. "You don't want to make them miss. Might hit you in your rear."
"And you don't want them to hurt your ass. It is very nice.", Pink nodded.

The tip of the wooden cock pressed against the pussy, almost, but not quite, penetrating. The wetness of the cunt, mingled with the lubricant secreted by the wood.
"OK. I think we are ready. Hoist her up!"

Instead of increasing the force and pressing the wood into the vagina right away, the strong, branchlike arms swung her away from the trunk. And then brought her back with even greater speed. Susan's lower body hit the tree right on the spot, impaling Susan on the wooden member. It became buried to the hilt, and Susan's butt made a smacking sound as it hit the trunk.
The pixies knew their craft well. Had the artificial member been any larger, or not been made out of fresh and flexible wood, it might have truly hurt her tender opening.

Pink, having failed to find away to support herself, was hit by a bouncing breast and knocked clean of Susan's body.

Susan gritted her teeth, cutting off any response she may have had to Pink and Yellow, as the tree's cock pressed against her slit. Even if she couldn't fight free, she was going to try not to cry out when the thing penetrated her.

The pixies defeated this attempt accidentally as the tree swung her back instead of pulling her forwards as she'd expected. "Huh? What're you... Aaah---AAOW!" The pixies may have made the monster so it wouldn't cause any serious injury, but being thrust onto its shaft and hitting its trunk like that still hurt. She didn't even notice the small victory of Pink being smacked away when her breast hit the faerie.

The tree held Susan firm with its hands and tentacle-like branches. Using Susan's surprise to its advantage, it pinned her legs, pressing them back and holding them down in such a way as her thighs were almost paralel with the ret of her body. It started to move Susan's body back and forth with short, strong moves.
The wooden cock oozed more clear liquid from tiny pores. This liquid was altered by pixie magic to serve their purposes. Not only was it an exellent lubricant, it had a slight cooling effect as well.
Each stroke made a wet, sloppy sound, as Susan's tight cunt was flowing with juices, some spilling out on her thighs and bottocks.

"Nnngh... Let... aah... let me... uhn... go."

In her current position, Susan could do no more than squirm slightly to try to get free from the tree. She could still protest, and did so, but her protests didn't sound convincing even to herself. In truth, the cooling effect of the liquid was easing the aches and pains she'd got from this encounter somewhat and making the experience more pleasant than it would be otherwise. She wasn't going to admit that to the pixies, though.

The tree did not heed her wishes, having been granted only one purpose; to fuck Susans delicious pussy. Instead it continued to push Susan up and down its cock.
The pixies did not heed her either, having much too fun. One of them gave the living ropes a new order. One of them wrapped itsef around Susans body, and snaked its way dow to her clit, while the other started to tease her nipples.

Susan tried desperately to think of something, anything, that might cause the pixies to let her go before she gave in completely to pleasure.

"Aaaah... Stop... uhhn... that... oh! I'll... nnnnn... get.... aaagh... splinters!" She doubted it would work; the wood wasn't a type that would cause splinters and the ropes weren't even wood. Still, it was all she could come up with as the plants' actions quickly broke down her resistance.

"Splinters!? Oh, that has got to hurt! Why do you want splinters?", said Pink, now recovered from her fall.
"We mustn't hurt that nice pussy!".
Nonethess, Pink landed on Susan's finely shaped body to make sure there were no splinters. She rode the movements from the trusts, looking like a tiny surfer on Susan's thight tummy.

Green had an idea however. Hovering over where pussy and wood met, he pumped some more magic into the tree. In response, the atrifical member started to grow tiny, green and flexible buds, moving ever so slightly to tickle the insides of Susan's abused pussy.