In just a few minutes, Ben had been through the worst scenario he could imagine. He would have rather, fought against Vilgax, and Kevin 11, while inside an alien sewer system, than be smothered by his cousin's ass, and have her fart on him. He also still had no idea how much she, 'enjoyed' this.

Right now, Ben wasn't very far from that sewer part. Gwen had let it rip big time, and Ben could barely breath. In fact, he would have rather passed out, than take another minute of this. Until, something happened.
" *Cough* *Cough* What does she eat?" Ben asked, his mouth temporarily free from the ass flesh. He wanted to keep struggling, hopefully get hold of the omnitrix, and go Four Arms on his cousin. However, as he resisted, something began to happen.
Much of the noxious air had entered Ben's body, and he was starting to feel weird. Not weird like he was going to throw up, a different type of weird. Simaltaneously, as this strange sensation began to fill Ben, he failed to notice that his pinned hand was starting to pinch Gwen's rear.

"Soft," Ben said softly, his eyelids half open. His head started to rest back on the heavy, but cushion like cheeks. As his eyes became hazy, he closed them shut. Afterwords, he became more aware at how his surroundings felt. Sure all the ass flesh was hot, but if you calmed down, it felt good, comforting even. Another thing Ben enjoyed, as he adressed earlier, was how soft and squishy it felt around him.
Then, everything became a blurr.

^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^

Ben found himself laying down. Not on the ground, it was on something softer, and warmer. He couldn't even lift his own head, but if he did, he would have sighted a pair of huge breasts residing just above a hugely fat belly. Obviously, it was a girl he was on top ofe, but her face remained just off camera.
Ben spoke not a word, he enjoyed the softness of the mystery girl's body, and the unknown sensation he still felt. Anything else, he wasn't aware of, or cared about for that matter.
One thing he did notice was a weird tightness in his pants. Groaning, he looked down at his waist, and saw smething pushing outward. Now that was from a part in Health class that he actually stayed awake for.
Who ever said that girls mature 'much' faster than boys, obviously never had a magic fart to deal with.

"Hm, that's weird." Gwen noticed that her cousin wasn't fighting to get up anymore. He wasn't unconcious though, she could feel him moving around.
"Come on Ben!" she wiggled her ass to grind him further. She missed the struggling.