Because She Was Pissed At Joel:
Remember this night...?


The Star finally got some details...

The trouble started for the new mom after she decided to stay home with their 4-month-old daughter, Harlow, while Joel deejayed at Hornitos' Cinco de Mayo party at Crown Bar in L.A. However, while there, the Good Charlotte rocker seemed more interested in a seductive Lindsay than in spinning records.

"Their heads were practically touching, and he had his leg over hers," says one onlooker. "Joel has a flirtatious side, and he definitely wasn't turning her away."
Nicole was immediately alerted to the situation by her arch-frenemy Paris Hilton, who sent her a devastating text message: Lindsay was all over Joel!

Making the situation worse, Nicole frantically tried to call Joel, but he wasn't answering his phone.

"He was so zeroed in on Lindsay, he never heard his cell ring," a friend of the couple tells Star. "Nicole felt so incredibly helpless and upset that she threw her phone against the wall in a rage."

Poor Nicole. I never thought I would say it, but I do feel a little bad for her. I've been that girl waiting at home and it's a suckie situation. Let's hope she kicked his skinny rocker ass and all is well.