She's grabbed at the ankle.

Before her faculties returned to her, the closest one to her, the one she had shuffled around, lunged first, its distorted hand disproportionately long and bony swiping the air in front of it. Catching Jessica's ankle and tearing the support out from underneath her, Jessica fell. The euphoria of the blood wearing off almost instantly, as she felt the steel of its grip on her, it was all she could do to keep her head out of the murk.

Wild eyed, she looked around, twisting in the Crawling Dead Thing's grip to find a small rock to brace her self on as she worked on its grip. Just as she had moved her torso over the sloped stone and had reached to pry off the thing's hand, from behind her another Crawling Dead Thing's arms swept up from behind her, its weird claw-fingers enveloping the entirety of her shapely abdomen as well as her arms.

Just as Jessica's panicked mind figured out what had happened, the first dead thing continued its advance, its second long arm grasping the rock over her shoulder, sparing her its claw-fingers, but the thing pulled itself out of the water, and onto her, its wet body doing little to ease the friction it causes. Then she felt something that felt like cold yet fleshy tap the inside of her thigh. An all too-familiar touch after the embrace of the brute. Looking down she saw peculiarly enough, the beast lacked legs, ending in a crushed looking pelvis. Unfortunately the thing's maleness had survived whatever trauma made this thing. Infinitely shorter than the Brute's awful cock, it had a slimely sheen, and had a thickness to it like a bottle. And it was already turgid.
Jessica thrashed in the thing's grips, but to little avail. Her legs found no purchase in the murk, and their grips held her as fast as any change. The wet thing's face was then adjacent to her, its eyeless dead dace face boring into her. She grimaced an turned away. She felt the thing descend, and place its mouth at her neck, its sodden mouth having few teeth, but the threat real nonetheless. Jessica froze. And with that, the thing lined up its cock with her still euphoria dewed quim.
With a cold damp exhale on her neck, it pressed its cock into her. The thickness caused her such discomfort, she had to spread her legs further to alleviate the pain, even if it helped the beast. As it began its slow methodical thrusts, it moved its head down, resting its body against her chest almost tenderly.
Eyes held tightly shut, and face still turned away, and just as her body began to feel accustomed to the intruder, she felt one of the hands holding her down leave her, freeing her arm, and the second beast shift. Before she could fully process this change, a new cold and wet cock pressed against her lips, smelling of soil and damp, smearing a mucus on her face.