NEW YORK - (AP) - After days of denials, a choked-up Rep. AnthonyWeiner confessed Monday that he tweeted a photo of his bulgingunderpants to a young woman, and he also admitted to"inappropriate" exchanges with six women before and after he gotmarried. He apologized for lying but said he would not resign.

"This was me doing a dumb thing and doing it repeatedly andlying about it," the 46-year-old New York Democrat said after aweek of double-entendre headlines and late-night wisecracks full ofWeiner jokes.

House Democratic leader Nancy Pelosi immediately called for anethics committee investigation into whether Weiner broke Houserules.

The congressman - who was widely expected to run for mayor ofNew York in 2013 - said at a half-hour news conference that he hadnever personally met any of the women he corresponded with onlineand sometimes via telephone over the past three years, and was noteven sure of their ages. He also said he had never had sex outsideof his marriage.

He said he did not feel the scandal affected his work as alawmaker but would understand if his constituents decided not tore-elect him. "I'm going to work very hard to win back theirtrust," he said.

Weiner said he used his home computer and personal Blackberry,not government computers, in his exchanges with the women. But thatmay not protect him from House rules that say a member "shallconduct himself at all times in a manner that shall reflectcreditably on the House."

On numerous occasions, the House ethics committee has cited thatgeneral rule in finding a representative violated standards ofconduct.

Weiner said over and over that he had made "terrible mistakes"and done "a very dumb thing" for which he alone boreresponsibility, and he apologized repeatedly to his wife, HumaAbedin.

"My wife is a remarkable woman. She's not responsible for anyof this," he said. "I apologize to her very deeply."

Abedin did not attend his news conference, but Weiner said theywould not be separating over the scandal.

The scandal unfolded more than a week ago when a conservativewebsite reported that a photo of a man's crotch had been sent fromWeiner's Twitter account to a college student in Seattle.

For days, Weiner claimed that he hadn't sent the photo and thathe was the victim of a hacker. But he caused guffaws when he saidthat he couldn't say with "certitude" that the underwear shot wasnot a picture of him.

The scandal escalated Monday when the website,, run by conservative activist Andrew Breitbart,posted photos purportedly from a second woman who said she receivedshirtless shots of the congressman. The site said the pictures werein a cache of intimate online photographs, chats and emailexchanges the woman claimed to have. The website did not identifythe woman.

VIDEO: Rep. Weiner's news conference on tweeting lewd photo