Nothing and no one comes between Nicole Richie and her babydaddy, Joel Madden!
The new mom doesn't seem to approve of him being friendly with other women. Too bad he's a musician surrounded by hot, desperate, slutty chicks all the time!
But, the latest girl Nicole is hating on is Mary-Kate Olsen.
Last week, MK showed up at New York's Roseland Ballroom to watch Good Charlotte perform.
An insider tells Life & Style, "After the concert, Joel invited her back to see the tour bus. He showed her some baby photos of Harlow. Joel isn't one to lie or hide things from Nicole, so the next day he told her about it on the phone."
That seems like the right thing to do by Madden, though it might have been a bad idea.
The source adds, "Nicole freaked out. Joel thought she'd respect the fact that he was trying to be honest — after all, he and Mary-Kate are just friends — but Nicole was hurt and angry. He couldn't deal with it, so he hung up, and she kept texting him after that."
However, could Nicole's reactions be validated?
According to the source, though, Madden and MK have a history of "flirting." Adding, "During the dinner, Mary-Kate was very playful with Joel. It was all fun and games, but with the Olsens nothing is as simple as that. Nicole exploded at Joel and demanded that they leave the party. Afterward, Nicole warned him to stay away from Mary-Kate."
Then again, if Richie truly loves Joel, and more importantly, TRUSTS him, then there shouldn't be any doubt that he would cheat.
Unless he's done it before and that's why she's all freaked out?
The source adds about the unwed couple, "They're having their usual ups and downs. I think they're madly in love and want to get married. But I also think it's moments like this that will continue to keep their wedding on hold."
[Image via WENN.]