"I want you, you sexy boy." she responded. Ben's eyes widened, did he hear that right?
"You mean..." As Ben's voce trailed off, Centara spotted a rising bulge in his pants, and giggled. It seemed like she wouldn't need much convincing with this one. Just to make sure there was no further confusion, she answered Ben's question.

"Yes Ben Tennyson, I came for you, because I need you." Centara finished with a light moan. She was being completely honest with the human.
"You see," she regained her composure to elaborate "my race mainly cares about one thing, sexual pleasure. We strive for a great fucking every daylight cycle. We couldn't stop even if we wanted, our loins burn so hot after such a short time, that even the strongest of my kind have been driven sexually induced insanity. I like many, was quite content with the steady supply of cock, that was so easy to find where ever I looked. However, eventually, it got, boring. After exhausting every type of man, and every position physically possible, I honestly grew tired of the same old thing."

Sex that gets boring? Ben found that hard to believe.
"One day though, one of my lovers told me of you, the boy with the Omnitrix." Centara. Ben became confused again "I thought you said you didn't want the Omnitrix.".
"Oh believe me, when I first heard about you I wasn't interested in the Monitrix itself. The only thing that caught my attention, was what you could do with it." Okay, now Ben really wished he could scratch his head. Here was an alien, who had captured him, exactly like the tons of others he'd faced, only unlike them, she was interested in him, not the watch. So what could it, possibly offer her?

Ben got his answer, after Centara kneeled down.
"Ben, do you realize what you can do with that device?"
"Turn into aliens?"
"Exactly."
"Okay, but what does that have-" Centara placed a finger to Ben's lips. "Remember when I said I was tired of the same old thing?" she asked.
Ben nodded.
"Well then, imagine what those powers could be used for besides of fighting crime." As Centara spoke, she turned Ben's head towards the bed.
His eyes widened once again.

"When I first heard that the Omnitrix ws in the hands of a human child, I was abit discouraged. Today however, I witnessed quite the show." Centara said.
*******Flashback*******
Centara had the energy signal from the Omnitrix on her handheld radar. A trip to this primitive planet had better be worth it. As she got closer, some familiar cries began to be heard. The cries of passion.
Centara ducked down behind a tree. "Let's see this so called hero." she peered around to take a look. Her jaw dropped.
Gwen continued to squeal as Ben lapped at her inner folds. You give this kid a small burst of magic, and he suddenly has the smarts of a porn star. Back behind the tree, Centara began to remove her pants, it doesn't take much to get her horny.
As Ben switched licking circles around Gwen's vaginal lips, Centara was busy imitating him with her hand. It was subtle at first, but everything changed once Ben switched styles.
"Ben, I need you inside me." Gwen begged. Centara licked her dry lips Ben positioned himself. With one sheath, she shoved hr hand in up to her wrist. A loud groan escaped her lips, fortunately it wasn't audible over the grunts coming from the fornicating humans. Soon afterwords, Centara noticed how Gwen had momntarily gone limp after Ben penetrated her.
"Pathetic."
Ben then announced "Fuck! I'm gonna cum!". "Do it Ben! Cum in my PUSSY!" Gwen begged.
"Yes, do it!" Centara whispered. Once again she cried out in unison with the humans.
Unfortunately, unlike Ben and Gwen, she had no time to rest. The alarm in her wrist guard vibrated, someone had found her ship.
*******End Flashack*******

Ben tied to shake his head, but his hard on was unmistakeable. Centara grinned towards him once again. The burning in her loins had returned.
"I have powers, all sexual in nature. I can give you pleasures the likes of which you could have never imagined." she finished