Fiona sat on the edge of her bed, gazing out at the dimly lit swamp through the small window in Shrek's hovel. The night was thick with the heavy scent of moss and decay, a fitting backdrop for what she planned to do tonight. She wanted to unleash Shrek's primal instincts and submit him to her desires.

Shrek's snores filled the room as he lay on his stomach, his large form taking up most of the bed. Fiona approached him slowly, her eyes fixed on his bare behind. She loved how rugged and masculine he was; it made her insides quiver with wanton desire. She knew just what she needed to do to get Shrek's attention.

With a cunning smile, Fiona reached for the dagger strapped to her waist. The cold metal felt good in her hand as she began tracing lines across Shrek's back, making him stir restlessly in his sleep. The tip of the blade drew droplets of blood on his olive skin, and Fiona licked them off eagerly.

The sweet taste of Shrek's lifeblood fueled her lust. She leaned down, pressing her lips against his neck, and began to nibble gently. Her teeth grazed over his skin, drawing more beads of crimson that trickled down his chest. The sight and scent of blood excited her, making her wet with anticipation.

Suddenly, Shrek awoke, startling at the sensation of Fiona's fangs on him. He glared at her through the darkness before realizing it was his love. "Wha- what are you doing?" he growled.

Fiona stood up and straddled his waist, her firm breasts pressing against his muscular back. She placed the dagger to the side of his neck and whispered into his ear. "I want to show you a new kind of pleasure, Shrek. One that we've never explored before."

"Blood play?" he asked, his voice thick with confusion. Fiona could feel his cock stirring against her thigh.

She smiled and nodded. "Yes. Trust me." Her hand guided the dagger to his neck once more, this time letting a small stream of blood run down his throat.

Shrek's eyes widened as he felt the warm liquid trail between his collarbones. Fiona leaned in again, licking up the blood before guiding Shrek's hand to his groin. "Masturbate for me, Shrek."

Confused and aroused, Shrek began stroking himself while watching the crimson stain on his chest grow with each passing second. Fiona could see how intrigued he was by this new kink. She reached down, dipping her finger into the puddle of blood and bringing it to his mouth.

"Taste yourself," she commanded, her voice low and seductive. Shrek obeyed, opening his mouth and allowing Fiona to place her bloody digit on his tongue. He swallowed, the metallic taste making him shiver with arousal.

With each stroke of his hand, Shrek felt more intoxicated by the mix of lust and blood. The sight of Fiona watching him intently only served to heighten his excitement. "Fiona," he groaned, feeling himself getting closer.

She leaned down, placing a tender kiss on his neck as she whispered, "Cum for me, Shrek." Her words were like an order, and Shrek's body responded without question. He grunted loudly as he came all over the sheets, his hot seed mingling with the drying blood.

Panting heavily, Shrek looked up at Fiona with a mixture of gratitude and shock. She smiled and kissed him deeply before helping him lay back down. "You liked it, didn't you?" she teased.

He nodded, a small grin tugging at the corner of his mouth. "I never thought I'd enjoy blood play so much," he admitted.

Fiona snuggled up to him, content with her newfound exploration. As they both drifted off to sleep, Fiona felt a surge of satisfaction knowing that she had introduced Shrek to a thrilling new aspect of their relationship. And as the night swallowed them whole once again, the scent of blood and desire lingered on in the dank swamp air. 
 In the heart of the murky swamp, Fiona's seductive plan had taken root, giving birth to a newfound kink that would forever intertwine their carnal desires. The dark secrets of Shrek's hovel now held the promise of blood and ecstasy, a wicked symphony that pulsed in unison with the beats of their hearts. And so it was, that amidst the damp stench of rot and decay, love and lust blossomed anew, bathed in crimson hues, a testament to the depths of human passions when pushed to its limits.