“I couldn’t be happier,” the proud mom told the mag. “The only thing you want is for your kids to be healthy and happy, and they are. I’m right where I belong.”

Sparrow is the second child for Joel and Nicole; the couple also has a daughter, Harlow, who turns 2 in January.

A spokesperson for the couple – who also have a 21-month-old daughter Harlow – has yet to comment on the reports.

The mother of two complained of pain following the incident, but elected to seek medical treatment on her own, according to a spokesperson for the Beverly Hills Police Department

Neither of Nicole’s children — Harlow, 21 months; and Sparrow, 1 month — were with her during the accident. The driver was cited and his car was impounded.

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Less than a month after Joel Madden and Nicole Richie welcomed their second child — a son they’ve decided to call Sparrow — the couple is expressing worry over their oldest child Harlow, who at almost 2-years-old is “having a tough time adjusting” to the idea of being a big sister to her brand new baby bro, The National Enquirer claims in its Sept. 28 print issue.

Tabloid tattles claim the 20-month-old is upset she is no longer the sole center of her parents’ world, and she’s not sharing the spotlight without plenty of hellraising.

“Harlow is used to being doted on day and night, by not only her parents, but their entire extended family and circle of friends,” says a source, who asked not to be identified. “A few days before giving birth Nicole told Harlow: ‘Get ready — you’re going to be a big sister soon!’ Little Harlow screamed ‘No!’ and threw a temper tantrum,” The Enquirer writes.

“She was already beginning to experience the ‘Terrible Twos’ before Sparrow’s birth, but now Harlow’s even more of a handful — testing boundaries and throwing temper tantrums,” the insider adds. “She crawls into Nicole’s lap every chance she gets and begs to be hugged.”

Joel and Nicole are hoping to curb Harlow’s insecurities with a series of special outings. The Good Charlotte rocker has promised to take his little girl out to the park and for ice cream in a few weeks and Nicole is planning a mother-daughter lunch especially for Harlow.

Adam’s former fiancee, socialite Nicole Richie, was beside herself with grief after learning of the DJ’s death of a rumored drug overdose in New York City last month. But that sorrow could soon turn to rage when Nic finds out that the man she still called a friend allegedly had sex with her lifelong best friend in September 2007.

According to a report in the Sept. 28 issue of Star, Paris seduced Nicole’s then-ex after running in to him at the Ultra Supper Club during the Toronto International Film Festival a couple of years ago. A frequent companion of Adam and Nicole’s during their two year romance, P.H. was in town filming her critically-panned camp musical Repo! The Genetic Opera — and she wasted no time “making eyes” at Nicole’s former lover and sobriety coach.

“She gave him a huge hug and kid, and he reciprocated,” says a spywitness, who recalls seeing Paris dancing seductively on Adam for much of the night. “They got more and more affectionate as the night went on, until they were all over each other. There was no doubt she wanted him.”

The two then allegedly retired to the DJ’s posh suite at the Metropolitan Hotel, where they did the mattress mambo until the break of dawn. A dishelved Adam emerged this following morning and promptly hailed a taxi to jet him to the airport.

Adam and Paris vowed never to tell Nicole — by then five months pregnant with her first child — about their one night stand. And for good reason. Paris, the heiress, and Nicole, the party-girl-turned-matured-mother-of-two, were inseparable as girls and grew up to claim reality show stardom as BFFs on the now-defunct reality series The Simple Life.

“Paris knows that the one thing you don’t do is sleep with your best friend’s ex…Paris crossed the line this time. This was the ultimate betrayal.”

The reality starlet gave birth to new son, Sparrow James Midnight Madden, in Los Angeles early Wednesday morning. And weighing in at 7lbs. 14oz, Sparrow isn’t just a big baby, his big news on the popular micro-blogging website.

“What a great day to come back on Twitter,” mom Nicole Tweeted late Wednesday. “Thank you everyone for your well wishes. I love my family!!”

Joel also updated his account with a post about his newborn, writing: “1st day of his life & my son is already a trending topic on twitter. That’s right son, ur just like your old man.”

Sparrow joins big sister Harlow Winter Kate Madden, who was born in January 2008.