The Fashion designer - who gave birth to Harper Seven on Sunday (10.07.11) at Los Angeles' Cedars-Sinai hospital - wants to stay in the US with husband David and sons Brooklyn, 12, Romeo, eight, and six-year-old Cruz rather than return to their native England so her "perfect family" can have a "great lifestyle" growing up in the sun.
The source said: "Victoria has told David she has never felt happier and that they now have the perfect family.
"She wants Harper to grow up in a place where she can have the amazing childhood the boys have had.
"Where they live now, they can play on the beach at the weekend, swim outdoors every day and have a great lifestyle growing up in the sunshine."
The couple moved to Los Angles in 2007 when David signed for US soccer team La Galaxy, but his contract at the club is set to run out at the end of next year and the 36-year-old hunk "hasn't ruled out" playing abroad.
The source added to The Sun newspaper: "David hasn't ruled out playing for a European or English team.
"He sees where Victoria is coming from though, with the boys so happy and doing well at school he knows it will be hard for them to move."
Meanwhile, the 37-year-old mother-of-four has reportedly splashed out £30,000 on a classic car for her husband to say thank you for being a perfect husband throughout her pregnancy.
A source told the Daily Star newspaper: "Victoria bought it from elite car dealer Chequered Flag in Los Angeles. She was very particular about exactly what car she wanted and what year. She asked for it specifically to be from 1966 as that was the year England won the World Cup.
"She even ordered a number plate with David's lucky number seven."