Some background

In their mating session, Becky and the tentacle had done more than just have sex. There was a binding of Becky in this process. This is part of the reason Becky had turned from horrified victim to enthusiastic, willing participant in the infernal coitus by the end.

The tentacle creature, a beast of hell, had formed a connection with Becky, a mortal of Earth. This connection was sealed when both parties climaxed.

On a more immediate level, the creature had injected a considerable amount corrupting fluid into Becky's most holy and **** spot, the center of her being, her womb. This fluid consisted of billions of demonic spermomorphs. These large, black, demonic cells looked similar to sperm cells, but their purpose was not impregnation.

Rather, these spermomorphs penetrated Becky's flesh like an infection and began to spread within her body. With every concession to her own growing lust, the spermomorphs gained more power and multiplied. Their job was multifaceted. Some of the cells which planted themselves in her vagina tissue and clitorus were now encouraging mass growth of nerve endings and lubrication glands. Others were starting to alter her body into a perfect vehicle of lust. Others still were placing themselves in brain tissue and spine, rewiring the teen's thoughts and emotions as well as establishing a telepathic bond to the realms of hell.

The more Becky gave into her feelings of lust, the more this infection of lust energies multiplied and the more it multiplied, the harder it was to resist temptation.