House was sitting in his office attempting to think, when a woman in her late fifties knocked on the glass. House looked up and instantly knew this was Cameron's mother. She was a little taller than Cameron, somewhat gaunt. Her eyes were like Cameron's, same colour and shape, with long thick lashes, but had wrinkles and crows feet around the edges. Her hair was grey, and styled short, mature, dignified, the same as she was dressed. She would've been stunning in her youth.

"Are you Dr. House?" She asked. A pensive expression had washed over her features.

"Yes," replied, as he stood up formally. "You must be Mrs Harvey."

She nodded. "Where are my girls?" She asked impatiently.

"They're currently in the psych ward," House tired to explain. "I can take you there."

"Do you know what happened yet?" She asked.

House felt like a failure, "No, not yet."

She asked him no more questions about anything the rest of the way there. She eyed his cane somewhat suspiciously. She seemed normal enough, just not what he expected.

PAGE BREAK

"Linda's not pregnant," Chase announced.

Foreman took over, "I spoke to her boss in New York, he said that she's isn't seeing anyone as far as he knows, and according to him, he has never heard of her dating anyone in the seven years she's worked for him."

House laid out the options, "So she's either very lonely, dating her boss and he's hiding it, or she's very private." House laid out the options, "Which gives us... nothing."

"We could check her apartment," Foreman suggested.

House's tone changed to curious, "Anyone think the timing is suspicious?"

"What do you mean?" Chase asked, "That they're both sick at the same time?" He tried to clarify. That wasn't suspicious, that meant it was contagious, or the exposure was the same.

"No, I mean with their father dying." House had an idea, he turned the white board around, "Forget the medicine for a second. What do we know about Cameron and Linda as people?"

"They're both smart, independent women." Foreman began, "Have professional jobs, both work hard and are good at what they do."

"Good," House responded and wrote the key words down.

Chase joined in, "They're both private."

"Excellent," House complimented him.

House waited, no more observations came from his team, "Come on, come on."

"They're pretty different, House," Foreman explained, "If they weren't sister's I doubt they'd have anything in common.

House lead them down his chain of thought, "By all accounts Linda is scruffy minded, she's a very talented abstract thinker. She's cold, doesn't have many friends, doesn't keep good contact with her family, she travels a lot."

House paced the room, "Cameron on the other hand is neat minded, very hard working, and is too soft for her own good."

Foreman chipped in, "Linda is withdrawn and disorganised, a few scientists I spoke to said she's a bit of a flake."

Chase interjected, "Cameron likes to be in control." He felt self conscious for saying it, because his reference point wasn't from their working relationship.

House picked up on Chase's ill ease, and couldn't help himself.

"What's the matter Chase, she didn't let you be on top?" House put on a mock whiney voice.

Then a light bulb lit up in House's mind. "Symptoms of sexual abuse..." He went to the white board and began to write "Promiscuity or frigidity, eating disorders and being intensely private."

"You think Cameron was sexually abused?" Foreman asked in disbelief.

"She's not promiscuous," Chase scoffed.

House ignored Chase's comment. "They both have opposing reactions to the same problem or trauma."

House glanced at the shocked faces of his underlings, "Say that Daddy did sexually abuse both girls, he dies suddenly and the flood gates open, and now they are both suffering from some kind of conversion disorder."

"How are we going to test that?" Foreman challenged.

"Talk to the brother and the mother." House stated as if it we obvious, "Either that or we try and set them off."

Neither Chase nor Foreman looked at him or each other. An uncomfortable silence fell over the room as they packed up there files and left the room.