As more drama unfolds around Britney Spears, the troubled singer reportedly begged her mother to help her regain the custody of her two children, whom she lost earlier this month.

According to Life & Style magazine, Lynne, who arrived in Los Angeles Monday, told reporters at the airport that her older daughter was on her mind "day and night."

"She never leaves my thoughts," Lynne said. "I love Britney dearly. I want nothing more than to protect her and make everything all right for her."

It’s been just days since the 26-year-old singer’s manager Osama Lutfi went public about Britney’s "mental issues" on Barbara Walters’ "The View," saying she is currently seeking professional treatment.

Sources say Britney, who wasn’t allowed to see her two sons, 2-year-old Sean Preston and 16-month-old Jayden James, is missing them very much, which is why Lynne flew over to L.A. on Monday.

"'I've got to get my boys back and I can't do it without you,'" Britney told her mom, an insider revealed to Life & Style.

Mother and daughter were spotted together Tuesday morning as they accompanied Lutfi to a Mercedes Benz dealership in Beverly Hills, but their reunion was far from happy, People reported.

"Lynne and Britney were arguing in the car the whole time. They're both upset and arguing, not having a good time at all," an onlooker said. The two carried on arguing 15 minutes later, as Britney drove a black Escalade off the lot.

"After she came out, she pulled over to the side of the road to argue with her mom more," the onlooker added.

Prior to their outing, Lutfi, paparazzo boyfriend Adnan Ghalib, longtime confidante Alli Sims and parents Jamie and Lynne Spears, all huddled in the artist's home for what sources labeled as "an intervention."

"Britney's mom was crying so much inside the house," a family insider said. "She is so hurt and just wants Britney to get better already."