, 47, opened up about her new role to friend and Who What Wear CEO Katherine Power in an Instagram Live chat.
The pair drank wine as they caught up and Cameron was worried about getting lipstick on teeth.
She said: "I haven't work red lipstick since Christmas."
The Charlie's Angels star admitted her routine has remained the same since going into coronavirus quarantine.
But she found living in house "dope" and that she loved "being in the womb of my house".
She said: "I've kinda been living a quarantine life anyhow because I have a three month old, three-and-a-half month.
"So my life has been completely quiet and still for the last few months. But I was able to have my friends over all the time. And now I just don't see anybody.”
The blonde beauty gushed about her life as a mom, saying she was "thrilled" about the new experience.
Cameron said: "I love being a mother. It's the best, best, best part of my life.
"I'm so grateful and so happy and it's the best thing ever and I'm so lucky to do it with Benj and we're having the best time. I'm thrilled. I can't believe it.
"I'm either cooking, cleaning or taking care of my baby - and usually all at the same time."
Like most moms, Cameron usually puts her feet up and enjoys a glass of wine after baby Raddix has gone to sleep.
She said: "I have to cook at night. I know people hate cooking… I drink [wine] every night it's my wind down for the day.
"After we do bath time with our baby and we put her to sleep, puts her to bed, he's so good. He's such an amazing father. I'm so lucky he's my baby's father. He's incredible.
"He puts her down and I go into the kitchen and I pour myself a nice glass of red wine. I start my cooking, I put on my show, whatever it is."
She also shared her tips for surviving the coronavirus crisis and admitted she tries to stay in the moment otherwise her mind will go to a "dark place".
"I'm freaked out about what's going to happen," Cameron revealed.
Cameron and the Good Charlotte rocker have been married since 2015 after they met at one of Cameron's dinner parties in 2014.
Cameron had invited Nicole Richie and her husband Joel Madden, who then asked Cameron if he could invite his brother - and the rest is now history.
They announced Raddix's arrival with a heartfelt note on Instagram.
Cameron and the singer both shared a written note on their respective Instagrams.
The note read: "Happy New Year from the Maddens! We are so happy, blessed and grateful to begin this new decade by announcing the birth of our daughter, Raddix Madden.
"She has instantly captured our hearts and completed our family. While we are overjoyed to share this news, we also feel a strong instinct to protect our little one's privacy.
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"So we won't be posting pictures or sharing any more details, other than the fact that she is really really cute!! Some would even say RAD."
Cameron retired from the spotlight to focus on her marriage with Benji in 2018.
Her friend and actress Selma Blair talked about Cameron's decision during an interview with Vanity Fair.
She said: "I had lunch with Cameron the other day.