She can't stop herself!

Max shuddered again as Maria prolonged her orgasm with deft fingers. She kept her eyes on Logan, though. She was drowning in them.

Logan was still gripping Maria's waist, deep inside her, in the last throes of his own pleasure, raking his eyes on Max's naked, glistening form. Without breaking eye contact, he raked his nails on Maria's spine, from her shoulder blades to the small of her back, making her arch like a cat, hissing with pleasure. Very slowly, he took a step back withdrawing his still semi-erect cock from Maria. He disrobed completely, always keeping a hand on the brunette bent before him, and his eyes on Max.

By now his long, thick cock was hard and erect again, glistening with Maria's juices and his own cum.

"Max?"

"Huh? Yeah?"

"I want to taste you."

Max opened her eyes in alarm. She was afraid of this.

"Logan, we can't! You'll die!"

"No I won't. The virus doesn't survive more than a few minutes outside your body, otherwise I would've died when we both kissed my niece, or any number of times we both touched Joshua. Besides, I also want you to taste me..."

Max moaned at the idea. She could feel his heat, smell the heavy, musky scent of his cum in the room, and it was driving her mad. But it was too dangerous...

Logan took Maria's shoulders, turning her around and making her lie in the bed besides Max. Going around the bed on Maria's side opposite Max, he made her lie more to the middle, until Maria was fully across the bed. Then he took one of her legs and then the other, making her spread them wide open, exposing her neatly trimmed pussy dripping with his cum.

"Come on Max. Please. I want you to taste me, right here." he said, spreading Maria's pussy lips and rubbing her clit slowly. "We just have to be careful, not afraid."

Max bit her lip, scared. It was very dangerous, but the thought of licking Logan's sperm out of her sister's pussy went beyond her wildest wet dreams. Looking back at Logan's eyes, seeing his playful smirk Max knew she was lost. Slowly, she knelt on all fours besides Maria, carefully avoiding Logan's hands and bended over. At first she just stared at it, at the texture of her inner folds, the way the light shone off the pooled moisture. Then she took a deep breath, soaking in the scents. At last, she licked her lips before flicking her tongue at the exposed flesh. The taste was beyond description. After a few seconds Max let go of all her remaining inhibitions and proceeded to lick her sister clean, before proceeding to eat her pussy again. Then she heard Maria's muffled moans, and as she looked up to her, she saw Logan lapping her own cum from her sister's face. She froze, afraid that he had just infected himself, but after he finished licking Maria's face off, and gave her a deep, hungry kiss she had to admit he had been right. So she decided to properly thank her sister for help, and kept licking, kissing and sucking until Maria came again always under Logan's intense gaze.

Sitting back on her heels, knees apart, she put her hands on her thighs and arched her back, thrusting her full breasts with engorged nipples at Logan.

"So Logan...what do you want to do now?"