There’s trouble in paradise for Nicole Richie and baby daddy Joel Madden. Though to be fair, it doesn’t exactly sound like Nicole has considered her life to be like paradise for a while. Nonetheless, you’ve got to ask yourself, what kind of a trampy, trashy, harlot skank would come between a new father and the mother of his child? Why none other than Nicole Richie’s “supposed” good friend, Lindsay Lohan. Leave it to the Lohan to be the skankiest person in any given situation.

While Nicole Richie was home caring for her baby, her fiancé Joel Madden spent a boozy night partying with Lindsay Lohan. Needless to say, Nicole was crushed. 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.”

[From Star]

It sounds like it could be friendly or somewhat innocent behavior on Joel’s part, but I never assume Lindsay Lohan has good intentions. That troll lives for drama. And what’s more dramatic than breaking up the relationship between your good friend – who just had a baby a few months ago – and her boyfriend? And what the hell else does Lohan have to do these days? Her career is nonexistent. She spends most of her days getting her hair done and making her body look orange. I don’t really like Nicole Richie, but I hope she throws a shit fit and bans Lohan from her life.

Here’s Amy Joel Madden and Benji Madden at Hornitos Tequila celebration of the ultimate ‘Cinco de Mayo’ experience at Crown Bar where the flirtation took place. Header of Joel and Nicole not looking too happy on May 9th. Images thanks to WENN.