Mr Weiner is now set to face an inquiry by the Ethics Committee of the House of Representatives, which could recommend that he be reprimanded, fined, or even expelled if official resources were misused.
A Las Vegas Blackjack dealer claimed he had called her for phone sex from a congressional line, while a pornographic actress alleged he offered to have someone from his "team" help her prepare misleading responses to media enquiries.
He then claimed his account was hacked, but the story unravelled when more pictures came to light.
When asked: "Did you use government resources for this kind of activity? Asked if he used "congressional phones, congressional email, congressional time", he said: "No, I didn't".
But Lisa Weiss, a 40-year-old blackjack dealer, who said she had exchanged 220 messages with Mr Weiner since contacting him on Facebook in August last year, claimed this was not the case.
"I gave him my number and he called me from his office and we proceeded to talk dirty for at least 30 minutes," she told Radar Online.
"A few days later, I tried to call him back on that number – there was a recorded message that it was an outgoing US Congress line only." Five of their 15 messaging sessions occurred during days when Mr Weiner spoke in congressional debates, Miss Weiss alleges, adding that he ended one, on the day of a crucial vote, with the words: "off to class".
She produced explicit records of the congressman telling her to send naked photographs and describing his state of arousal.
He said he was a "caped crusader" who was "looking for my sidekick".
Meanwhile Ginger Lee, a pornographic actress who says she exchanged sexual emails with Mr Weiner, said he sent her a message suggesting she tell the press she had "nothing to do" with his situation.
"Do you need to talk to a professional PR type person to give u advice? "I can have someone on my team call." Mr Weiner, 46, said he had not "violated any rules" of the House of Representatives.