And judging by pictures of the singer relaxing in Australia with her man, it's easy to see why.
Not only is the handsome music exec devoted to the pop princess, he's a clear natural with her two boys, Sean Preston, four, and Jayden James, three.
Jason, who also acts as Britney's manager, looked like one of the family as he accompanied mother and sons aboard millionaire media owner Paul Ramsay's boat, Oscar.
The happy group, accompanied by a team of minders, had lunch on the vessel – which is moored at Camp Cove near Watsons Bay, after cruising around Sydney Harbour.
Britney, who at one point showed off her trim figure in a green and white striped bikini, is half way through her Australian tour.
Her run of shows in the country has been a talking point after stories began to circulate about upset fans walking out of gigs over her lip syncing.
Her spokesperson has dismissed the claims as "pure fabrication", however.