Whatever else the venom was doing to her, she suddenly didn't mind. The combination on her weakened muscles and that amazing musk was affecting her head and body. Shanon felt her pussy grow wet as the smell grew stronger, becoming the only thing she could smell. A distant part of her mind struggled against it, but it was quickly drowned by the musk.
Something hard and stiff pushed against the wet between her legs. It easily slid inside her, ridges along it dragging along her walls. Shanon felt a sudden orgasm rock through her body, squeezing at the stiff organ invading her insides. But thankfully that did nothing to stop its movement.
As its thin tip moved without resistance its thicker length entered her and it felt amazing. The spider above her hissed and Shanon realized the hard shaft belonged to the monster. That thought dragged another orgasm out of her as well as the thin tip pressing against the tight opening on her cervix. Except the venom had weakened all of her muscles, letting the shaft force itself in without struggle or pain.
It traveled farther and farther, finally pushing into her uterus with the thicker part stretching her opening even more. Then she felt a large bulge press into her stretched opening, forcing itself in and bringing Shanon into another orgasm. The weak spasms of her walls sucked at the now flexing shaft, helping the bulge in.
Through the haze she was in, Shanon now realized it was an ovipositor that the spider had thrust into her, and it was laying eggs in her. She trembled excitedly as the egg reached her stretched open cervix. The flexing organ grew more vigorous and forced the egg forward more and more until it was layed in her womb. But it wasn't over as another egg squeezed into her, easier than the first, and traveled through her tunnel. But as it reached her cervix another egg squeezed inside.
Egg after egg, orgasm after orgasm, dozens of eggs left to gestate inside her, until the final egg was layed in her swollen belly. The spider pulled its ovipositor out and wrapped its web over Shanon's twitching pussy, keeping its young safe. As the spider left, she let out a satisfied noise, a broodmother to a monster she couldn't believe she was afraid of at first.