Jessica is overcome

The sensual rush of the good blood in her system with the thrusting below her overcame her resolve. Jessica bucked hard against her non-consensual lover. Ironically breaking her free, but twisting her into the surrounding murk.
The crawling thing cried out in pleasure, and she felt a heavy throbbing inside her, pushing her over the peak as well, as her body seized in the mud, working her lover as deep into her fold, capturing all of his essence. Jessica's mind and body roiled as its masculine pump filled her vessel, leaving her mouth agape and banishing all thoughts.
The second crawling thing finally found her mouth, and enraptured as she was, she began to slid the large cock into her mouth, quickly reaching the base. The terrible flavor a side note as fireworks still went off in her head. Around her more dead crawling things smelled the blood and woke up. The third already crawling its way to legs, as her first rolled off in a lazy drop.
Jessica was never found.

Using blood makes the beasts notice you more easily. Though the blood vials are almost more drug. Jessica is more susceptible to pleasure the more she experiences it without release as the night goes on.