Selena can only moan in intense pleasure and frustration as the sap begin work its magic and her gun is smacked out of her hand. Her limbs suddenly felt so heavy as her body seemed to relax and go slack against her will, and before she knew it the tip of the plant's stamen was rubbing against her slick entrance. As Selena starts to feel the many tentacles begin to pull her down and coil around her she can't help but think that the plant's sexual organ is well over a foot long, and as her velvety walls are begin to spread around the odd orange colored shaft she can barely even moan, her mouth occupied as it was by another tentacle. Inch after inch begins to disappear into her pussy as time seems to stretch on yet blur at once. Before she knows the plant's long rod is so deep inside her its bulging her stomach out with its shape, and when it meets the resistance of her cervix she can still see its was at least six more inches to go till total insertion. A rough yank down on the plants part solves that problem, Selena's surprised scream muffled by the nectar oozing plant limb in her mouth as the pseudo-cock pierces straight to her womb. She can only pant as she find herself sitting in the middle of the giant pink bulb now, its stamen completely inserted into her blazing hot body.
As more tentacles rubbed themselves all over her body Selena can only moan and whimper submissively, utterly caught and helpless now. A number of them wrap around her hyper sensitive chest, making milk squirt from her stiff nipples as the limbs move almost as if to deliberately milk her. The limb alternate in squeezing each tit, making Selena's body sing with ecstasy as her big soft breasts are massaged. More wrap around her legs as well until one inevitably finds the tight little pink star of her anus. A littler pressure later and her last remaining hole is invaded as a thick green tentacle begins to push into her ass, slowly going deeper... and deeper. Before to long Selena begins to feel it coil around inside her, seemingly on a quest to fill her in way no other thing possible ever could.
Selena can only wiggle and squirm as her body reflexively milks the the tentacles and shaft inside her in some feeble attempt to push the intruders out, instead likely only increasing whatever pleasure the plant could feel if it could even feel such a thing. The ground is wet and soft, making Selena feel like she's sinking into the floor. That sudden thought strikes like a lightening bolt in her mind. Could this plant be pulling her underground? Her mind begins to race as she continues to be raped; did the plant have some kind of underground chamber to store its victims in? Maybe it was part of some rape-plant network all throughout the basement? Where they connected in such a way that she could be dragged to some other room in the basement labs away from Madeline? Whether or not these suspicions had any ground or not Selena can't help but eye the big petals of the bulb, hoping they wouldn't close around her.
Spoiler (click to show/hide):
I don't know if you have some long term plan here, but the idea of an interconnected plant network sounds super fun to me if you don't!