Not much choice...

Considering you are completely dependent on the Keltraxans you agree that you shouldn't refuse their wishes. Looking up at your father you sigh, "Fine... you're right..." Looking at her with distrust you add, "But be careful daddy..."

Nervous himself, he walks toward the short alien and slowly reaches down to run his hand down her shoulder. The Keltraxan woman letting out a soft purr from his touch, stepping forward with her eyes eager to fulfill her assignment. The Keltraxan scientists eagerly watching through the 2 way mirror and monitoring her brain activity. The sensors hidden inside her recording the location and degree of any pleasure she experiences.

Stepping closer to your father, she runs her hands down his chest and abs, pausing to look him in the eyes before gently caressing his cock. Her eyes wide as she feels his cock twitching from her touch, his need unseen among males of her species.

You watch with interest as the alien bites her lip, her thumb running across the head of his cock. Her eyes wandering down as she feels his slick precum leaking out. Raising her hand upwards, she examines it before slowly running her tongue across it. Purring at the taste and scent of your daddy's potent seed.

The aliens eyes lock onto Toby's with need as she hungrily licks her lips. Her heart pulsing rapidly in her chest and her blue/green skin starting to take on a slightly brighter tone. The Keltraxans monitoring her noticing her arousal remaining steady but her excitement and curiosity increasing rapidly.

"I know that look daddy..." You tease as you watch the sexy Keltraxan slowly go to her knees, remembering what she was told human males enjoy from their mates.

Looking up at him, she nervously runs the tip of her tongue across the head of Toby's cock. The slightly rough texture against his sensitive skin making him shudder in surprise. Her skin warming as she runs the tip of her long tongue across the underside, seeing another drop of precum forming at the tip.

The Keltraxan girl smiles deviously as she leans forward, wrapping her lips around the tip of Toby's cock. Your dad moaning loudly and running his hand through her soft hair as she sucks the head of his cock gently. Her heart racing as the tip of her tongue flicks across to lap up his precum.

She shakes nervously at the taste, her strong sense of taste making her realize she was not mistaken before. The humans preseed full of potent sperm... she realized how risky the experiment could be.

But your father quickly pushes her mouth further onto his cock and down her throat. Groaning at the feeling of her sucking eagerly on his cock, milking more of his precum.

Of course you knew the Keltraxan scientists didn't sent her in to have the human cum down her throat... Her hands grabbing your father's and quickly pulling them aside. Showing off her strength as he is pushed away from her.

But his look of surprise is short lived, replaced by a hungry stare as she turns into her hands and knees, thrusting her ass up in the air and side to side like a bitch in heat. Her pussy dripping with thick slippery juices down her thighs. Looking over her shoulder, she purrs with encouragement.

Walking up behind your daddy you press your hard nipples against his back as you reach in front of him and grasp his throbbing cock. "Mmmm daddy she looks so wet... So needy..." You moan in his ear, biting it as you add, "I can tell you are just dying to slip this inside her..."

"Uugghhh fuck Nina...." Toby groans as his cock jerks in your grip.

It's OK daddy..." Smiling deviously you whisper breathily as your eyes wander across the Keltraxan's sexy body, "I think it's kinda hot... Just promise me one thing daddy..."

"Fuckkk yesss anything!" Toby hisses, shaking with need.

Smiling with victory you moan softly....