Rachel gripped the mattress firmly, gripping and twisting her sheets with each of the mysterious dildo's solid thrusts. While her body accepted the dildo ever deeper inside, reforming and tightening around the thick rod with each thrust, her mind slowly slipped further and further into perversion. As the haze of sexual bliss washed over her, all she could think of was fucking. "I'm a dirty whore", she muttered into her pillow as the dildo pushed in, compelled by something growing inside her mind. The compulsion grew more powerful, and before she knew it Rachel was playing with her nipples. Her focus drifted to her breasts, and she smiled slightly in satisfaction as she felt how full they were, how hard her nipples were, and best of all how good it felt to play with herself.
Seemingly spurred on by her derangement, the dildo began to grind into her more deliberately, swelling inside her with each movement. Sensing that it was about to unload inside her, Rachel could only beg for her prize:
"Please.... fill... this cumslut! Give... me... your... CUM!!"
Right on cue, the dildo released itself inside of her. Stream after stream of red hot cum gushed into Rachel's willing body, while her lower half squeezed the dildo rhythmically for more. She could only scream in pleasure as each load came in, it's warmth growing and growing inside her belly. Thoughts evaded her as the sensation of being filled took over, blanking her mind again and again by each overwhelming thrust. A few powerful bursts later and the dildo's movements began to slow, producing larger and larger loads. One final massive load emptied into Rachel's womb, eliciting a coo of satisfaction from the newly minted cumslut.