Tati Nevas, the Brazilian woman whose video of Justin Bieber sleeping went viral, is now spilling the details on the night of passion she allegedly spent with the singer.

The British tabloid The Sun quotes Nevas as saying, "Take it from me, he’s well endowed — and very good in bed. A man must know what to do to make me happy — Justin did all that and more.”

The paper says that Nevas claims she was on her way to a club in Rio when a member of the Bieb's entourage asked her if she wanted to attend a party at the singer's house.  She and about nine other girls all went over to the house, where, Nevas says, Justin was "really polite" to her, as well as "surprisingly mature." 

After kissing her during the party, he later told everyone to leave, and, according to Nevas, they made love twice. “It was one of the best moments in my life. It was marvelous and unforgettable," the paper quotes Nevas as saying.  She also denies that Justin paid for the encounter.

In addition, Nevas denies she's the one who posted the video online.  She tells the paper, "I was still in bed with Justin when my friend texted me to say, ‘Oi amiga, where are you?’ I texted back, ‘I’m here in bed cuddling up to Justin Bieber.’”

When her friend said she didn't believe her, Nevas says, she filmed Justin and sent the video to her. “The video was just for her eyes only. I am really angry with her," the paper quotes Nevas as saying.

The paper also has a video, shot after the initial video went viral, in which Nevas is seen saying in Portuguese, "I was in shock because I didn't believe that the whole world would be talking about me like this…My family was really upset…I was really embarrassed."

Of course, if Nevas is so embarrassed, it seems odd that she'd tell the paper all the dirty details about her encounter with the Bieb.  So perhaps you want to take this story with a grain of salt.