let them go, but...

It started in her mouth. A strange, subtle tingling that spread back to her tongue and then down into her. She felt it on her chin, and realized it was her body reacting to the tainted seed. She heard the sound change coming from her own body as her pussy started getting wetter and wetter. She looked up at the euphoric face of the half-zombie in front of her as it's father drilled deep and hard into her. She barely heard the low, long moan she let out.

Quickly, the old man pulled out with a grunt. Jace cringed as he saw an oozing rope of cum follow, connecting his throbbing cockhead to his sister for a brief second before it snapped and dripped down her thigh. She old man stroked himself hard, shooting huge wads onto her back, ass, and pussy lips. He looked at her glistening eyes, and panted.

"Alright. A deal's a deal." he said. He walked over to a bottle of grain ****, poured some on his privates, and then stuffed them back in his pants. Jace grimaced as he saw that Kelly, for whatever reason, was still bent over, her body shivering...

"What's happening to me?" she thought. Her nipples were painfully erect. Her whole body was tingling, every nerve alive and yearning to be triggered. And her pussy! She could feel it yearning to be licked, touched, and filled. Her clit throbbed with each deep heartbeat. She bit her lip to stifle a moan and barely opened her eyes when she heard her brother call to her.

The old man pulled her to her feet and handed her her clothes. Jace watched as they disappeared back to the van. He couldn't be sure, but it almost looked like she was... grinding herself against him. Jace looked at the half-zombie, and spat. "What the fuck are you?" he asked, hearing the footsteps return.

The thing looked up. "You'll know soon enough." it said with an expression that was almost pity. The old man leveled the shotgun on him, got him loose, and just grinned as he walked him back to the van. Kelly in the back, still naked. "Poor girl must be in shock." he thought. Jace knew that he'd come back and kill both of the bastards when he saw the cum still oozing down her thighs.

"Go on. Git. You know what to do." the old man said, and backed away. Jace had **** staring down the barrel of the shotgun, so he turned the car over and pulled away from the house, his sister mumbling softly in the back, her long legs sliding smoothly over each other.