Desperate JADA PINKETT SMITH  is at her wits’ end as she fights to save her wild-child daughter Willow – and her shaky marriage to superstar Will Smith.

A source says Jada, 42, is deter­mined to pull mega-talented but deeply troubled 13-year-old “Whip My Hair” singer Willow back from the brink after several episodes of shocking behavior.

At the same time, the former “HawthoRNe” star is struggling to maintain the facade that her 15-year marriage remains solid, de­spite reports that she and box-office champ Will, 45, have secretly split.

“These are very stressful days for Jada,” a Hollywood insider told The ENQUIRER.

“But she’s selflessly putting aside her personal anguish over her problems with Will to break through and rescue Willow.”

Willow raised eyebrows earlier this year when she released a sexy music video for her single “Sum­mer Fling.” She’s also worn a jacket with “I hate every­one” scrawled on the back and posted online a series of troubling statements such as “I think my thoughts are trying to murder me” as well as a bizarre drawing of a crying girl with the words “I shall never speak again.”

Now a concerned Jada has made getting Willow on the right path her top priority, said the source.

“Jada is terrified that Willow’s already a victim of the ‘too much, too soon’ lifestyle that’s destroyed so many young performers,” said the source.

“She’s even admitted that she and Will might have made mistakes allowing Willow and her big brother Jaden to reach for the stars so young.

“But Jada’s convinced that tough love combined with quality time together can undo the negative effects of developing Willow’s talent at the expense of her child­hood.

“Jada told a friend, ‘I know in my heart Willow’s a good girl. And I’ll do anything to save my baby.’”

Meanwhile, 15-year-old “Karate Kid” star Jaden – Will’s sidekick in the summer flop “After Earth” – has also been slammed for posting an expletive-laced tirade on Twitter.

“The children have created a huge strain on Will and Jada’s marriage, and it doesn’t help that the couple appear to live separate lives,” the source added.

But for Jada, rumors about her marriage take a back seat to Willow’s fragile state, said the insider.

“Jada is encouraging Willow to open up to her,” said the source.

“They shop together, gossip to­gether and just take time to laugh with each other. Jada believes that while Willow may have been swept up in the tidal wave of show busi­ness fame, she can still have a normal childhood.

“She’s comforting Willow with a mother’s love, showing her that while fame is fleeting, family is forever.”