Both The National Enquirer and sister publication Star Magazine are reporting that Lindsay Lohan is drinking again, with witnesses seeing her boozing at a party in Long Island over Thanksgiving with her then-boyfriend, Riley Giles. Star takes it a step further to quote a witness who claims she was begging for Xanax and cocaine from her friends, and then hooked up with a drug dealer. They also say she caught Riley having sex outside the party in the woods that night with a girl he just met! Lindsay was screaming and freaking out at Riley, and although she went home with him that night they broke up shortly afterwards.

“Almost as soon as she landed [in NY on November 18], she called up all her old friends and asked if they had any Xanax and blow [cocaine],” says her pal. “She really hounded them and begged!…

“Everyone I know said know, but she kept asking. She wanted them to come to her, but then she said she’d come to them. No one would do it….

“Finally, she met up with a drug deal named Chris,” says the source. “He’s well known in New York, and they spent some time together. Nothing good comes out of hanging with Chris.”

Another source confirms that Lindsay and Chris spent several house “behind closed doors” together. “She was with Chris, yeah,” says the insider. “She’s known him for a while.”

[From Star Magazine, print edition, December 17, 2007]

People say Lindsay was “out of her mind wasted,” and maybe it helped blunt the pain of being so publicly humiliated by getting cheated on at a party. But considering that she was in a room presumably alone with the drug dealer for hours, Riley might have been cheating on her as retaliation for cheating on him first. I’m surprised they didn’t stay together, considering how well-matched these two addicts are:

“Turns out this guy Riley, who must be an idiot, had taken some girl from the party into the woods and had sex with her,” explains the friend. “Who has sex in the outdoors in the freezing cold during a house party? And with his girlfriend inside?

“When Lindsay found out, she went ballistic. Everyone at the party watched her yell at Riley. She was crying and sobbing. It was a major scene.”

[From Star Magazine, print edition, December 17, 2007]

This is one of those rare cases where the insider quoted in a gossip rag does sound like an actual person because the quotes are in a unique voice and aren’t too salacious or perfect-sounding. The witness says that Lindsay was embarrassed after she freaked in front of everyone, but that she wouldn’t accept multiple offers for rides and wouldn’t take any food or water offered to her. She ended up leaving with Riley, who was also in no state to drive.

Several days later Lindsay was spotted with Heath Ledger and is said to have bumped uglies with him. She was also seen out with Stavros Niarchos, Paris Hilton’s fallback boyfriend, on November 28. Stavros has since briefly reunited with Paris, probably because Paris heard that he was out with Lindsay and decided to stake her claim again. Lindsay was said to have asked Stavros to make out with her last September in a bid to make her ex, Harry Morton, and Stavros’ perpetual ex, Paris Hilton, jealous. It sounds like she used this same tactic again after Ledger hit it and quit it. (Thanks to the Evil Beet for that euphemism.)

Lohan is shown leaving a hair salon on 12/8/07. Thanks to WENN for these pictures.