Britney, Jason & The Boys: One Big Happy Family!

Britney Spears and her manager/boyfriend Jason Trawick, may have been frolicking aboard a yacht called Oscar on Nov. 15 — but it might as well have been named The Love Boat.

The pair, along with Brit's two sons, Sean Preston, 4, and Jayden James, 3, looked every bit the committed couple while sailing in Sydney Harbour, and friends tell OK! their affection for one another is as unsinkable as the 108-foot vessel on which they cruised.

"Jason adores her and just wants to be with her," a pal of the pair, who went public with their romance in June, tells OK!. "He's proactive with the boys and works hard to show Britney how committed he is to her and to her family."

Indeed, Jason, 37, does seem to go the extra mile for Brit, 27. Sources tell OK! he spent every night with the singer at her L.A. home after their trip to Mexico in October. And then, of course, he flew halfway around the world to support Britney on her Australian Circus tour.

"Britney trusts him implicitly with the kids and feels more secure going to work when he's with them," says the friend." What's more, Sean and Jayden appreciate his presence, too. "He's a total hero to them," another Brit insider reveals to OK!.

"He's a natural. Britney loves to see the boys with Jason. It just seems so right." Echoes the first pal,"The kids adore him and call him 'Jase.' He is amazing, engaged, caring, fun — even ex husband Kevin Federline likes him."

It's good that everyone's on board. The day before their high seas adventure, Jason, Britney and the boys strolled through Sydney's Botanic Gardens, stopping to cuddle close for what looked like a family photo. Jason pulled Britney to his side, while the singer leaned into him and flashed a smile. It was an awfully pretty picture, and one that the Brit pal says we should get used to seeing.

"Britney wants her life back," says the pal. "And she sees the stability Jason brings as a means to an end." She might also be seeing her beau as the perfect roomie. "I think after the tour he's going to move in with her," reveals the friend. "They're talking about taking the next step."