Birth Day

House/Ben 10 AF Crossover

Summary: It's Ben and Gwen's 16th birthday, what starts out as simple food poisoning in both seems to set off a violent and mysterious illness in the other.

*I'm pretty much ignorant at medical terms and what can or can't cause what- but I researched as best I could and am asking you to roll with it.*

Chapter One: The Start

Part I

"Why are my eyes covered?" Gwen Tennyson asked as Kevin Levin still held his palms over her eyes. "It's usually part of the process of a 'surprise'." Kevin responded, guiding her out into her back yard. She could hear muffling and knew exactly what lay in front of her, but decided to humor him.

"Okay, stand right here." Kevin pulled her toward the middle of the patio.

"Ready, one..two..three…" He took his hands away right at three, allowing Gwen to be greeted with her family and friends screaming 'HAPPY BIRTHDAY'.

Before her stood her family, Ben and his family, along with all the Plumber's kids. Above them was a banner with 'Happy 16th birthday Ben and Gwen', and a cloth covered table was cluttered with presents and a large cake.

"Aw, you guys shouldn't have." Gwen giggled with slight embarrassment.

"If I had to be subjected to it, then so do you." said Ben.

"What should surprise you more, is that it was all Kevin's idea." Julie chimed in as she stood next to Ben. Gwen snapped her head in Kevin's direction and gave him an incredulous look, "You planned this?" Kevin feigned resentment, "It could happen."

Gwen smiled and walked over to give her parents and grandfather a hug, "Thank you, so much."

"I made some cactus and liver burgers for us to eat." Grandpa Max said, earning a few cringes in the crowd.

"Sounds…great." Ben and Gwen said in unison.

40 minutes later.

"Where is the birthday boy?" Manny asked as they were about to open presents. "He's in the bathroom, I think Grandpa Max's food didn't sit well with him." Ken, Gwen's brother replied. Everyone gathered around the table to await Ben, he being to oldest allowed him to open his presents first.

"I'll go get him." said Kevin as he headed inside.

Gwen felt a wave of nausea hit her and she stumbled toward the nearest chair, this was not lost on Julie.

"Hey, are you okay?" Julie asked with concern.

"Just a little nauseous, that's all." Gwen replied as she held her stomach.

Not two minutes later, Kevin had rushed outside in a panic.

"Ben won't stop vomiting, we need help!" Kevin yelled out, alerting everyone and causing a panic. Ben's father and mother rushed into the house first. As Gwen got up to go and help she felt her vision spot over. It was Julie who looked back to witness the birthday girl faint and fall hard onto the concrete patio.

"GWEN!"

Part II

"Are they okay?" Grandpa Max asked the attending doctor while both of their parents and Kevin stood by.

"Just a bout of food poisoning, all they need is rehyrdation and rest." Dr. Cameron explained. "We will be giving both an electrolyte solution to help stop the vomiting, it's basic over the counter medication." she began administering the medication to Ben.

"The nausea should let up after a while." Dr. Cameron walked toward Gwen's ER bed and administered the medication for her as well.

"Now, it was the cake that caused this?" Frank Tennyson asked.

"Raw eggs could mostly likely be to blame, perhaps the batter wasn't cooked all the way in the portion that they ate." explained Cameron.

"And here I thought it was the cactus liver burgers." Ben laughed before another wave of nausea hit him.

"That's a shame, would have stopped your Grandfather's cooking for good." Kevin replied as he walked over to Gwen's bed. When he glimpsed over at her he immediately shot his head back in her direction.

"I'm itching, itching all over." Gwen muttered, her nails scratching her arms and pallid face. Visible sweat glistened on her brow, and in that instant she began to wheeze.

"What are you feeling?" Cameron rushed over to look at her pupils, now dilated.

Gwen began to seize violently.

"Gwen!" Yelled Grandpa Max

"Oh my god, my baby girl! What's going on!" Lily Tennyson shrieked.

"GWEN! What's happening to her!" Kevin cried out frantically as he pushed down on Gwen's flailing body.

"That's not suppose to happen- I NEED RESUSCITATION!" Dr. Cameron yelled to the nearby nurses. "She's going into anaphylactic shock, I need an ET tube stat!"

Part III

"We've got two cousins with the identical symptomsMoral of food poisoning, symptoms began simultaneously after ingesting cake." Dr. Cameron quoted off the medical charts.

"'Let them eat cake' suddenly lives up to it's malicious context, Marie would be thrilled." House remarked, throwing his nerf ball back up in the air. "Why would this interest me?"

"Because after treating both with electrolyte solution, one recovered completely while the other went into anaphylactic shock." said Cameron.

"Then obviously she's allergic to something."

"We figured that, and stabilized her. She had nausea and fainting before she came in, considering her cousin developed symptoms they believed they were related. When we took blood samples we found something that….would interest you." Foreman cut in, and handed over the blood work to House.

House grabbed the files and glared at them intently, " She has almost no white blood cells- she should be bald, withered, and coughing a lung out."

"But she's stable, sleeping, and has a head full of hair." Taub retorted.

"She just went through anaphylactic shock, and for that- I'm not that impressed." House said.

"But something did cause the shock, and with such a low white blood cell count- we're looking at a long list." Foreman added.

House rose from his chair and grabbed his cane, "She better be jailbait worthy."

Foreman, Taub, and Cameron looked at House with surprise. "You're actually going to visit a patient?"

"I'm going to make sure she isn't wearing a wig."

Chapter Two: Irrational symptoms