Here is what I really think happened. Weiner follows both Gennette Cordova and porn star Ginger Lee on Twitter. Weiner probably sends sexts to Ginger Lee, as her Tweeting history tends to show (she's Tweeted that she receives DMs from Weiner before this happened). Weiner was feeling a bit horny over the weekend, got all hot and bothered, and took another photo for Ms. Lee. Problem is, he was either drunk, stoned, or just an idiot, and he sent the message to Gennette Cordova, with a public tag, instead of Ginger Lee with a private tag. Once it came to surface, he either had to confess to his wife that he trades lewd photos with a professional whore, or that somebody "hacked" his account, including his cell phone, and possibly his Facebook account as well.
So, once the first lie is told, and he realized it would mean that the authorities would get involved, he's played the game of being snarky, belligerent, above it all, or confused, and his statements sound more idiot each time he opens his mouth.
Dude should just confess and stop baiting the people who are giving him the chance to come clean. Instead, he mocks them, which only furthers the media's resolve to find out what happened. It's just unbelievably stupid by Weiner.