JUSTIN HOPES BABY TO ANCHOR JESSICA!

TERRIFIED Justin Timberlake is desperate to get the sexy back with his long-suffering wife, Jessica Biel, by getting her pregnant with their third child, sources tell GLOBE.

"He worries she's slipping away from him, and it's been building up since his embarrassing DWI," says the insider.

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Justin's panic escalated after the former 7th Heaven star, 42, posted a cryptic post on Instagram for his 44th birthday.

Most of it was standard sweet birthday wishes. "Another year to make memories that I keep sacred in my heart. Another year of joy and challenges being a parent with you," she wrote.