Has Prince William jetted on-again love Kate Middleton to a secluded island paradise in the Indian Ocean in order to figure out their future?

The London Sun speculates the heir to the British throne's decision to book a getaway to the ritzy Desroches island in the Seychelles may have been matrimonially motivated, with sources positing that the "palm-fringed sandy beaches ... will provide an irresistible setting for the Prince to propose."

London's Mail on Sunday, however, believes the respite is more of a "make-or-break holiday," with an insider cautioning, "To be honest, I don't think William is convinced even now that Kate is the girl for him but it seems as if he at least wants to try."

The toothy twosome, both 25, dated for five years before briefly calling it quits in April, but they appear to be enjoying their together-time away from the prying eyes of the public.

The Sun says they checked into their luxurious island digs under the pseudonyms Martin and Rosemary and have done a bit of snorkeling.

Says a spy, "They are enjoying pretending to be just an ordinary young couple in love on a romantic holiday.

Meanwhile, in related royal romance news, the London Sunday Mirror is convinced Prince Harry has asked longtime love Chelsy Davy to be his bride -- at some point in the distant future.

The ginger-topped, party-disposed Prince supposedly popped the question to Chelsy during a recent safari in Botswana, but they've opted not to become "officially" betrothed until after the blond-haired, South Africa-based looker completes her postgraduate degree in politics at Britain's Leeds University.

"It will be 18 months down the line before they go public about their engagement," a snitch tells the tab. "Harry and Chelsy are serious about each other and are both keen to make more of a commitment. Neither of them can imagine living without the other. It's just a question of how and when it will happen."

Davy, by the way, is reportedly on the mend in Cape Town after undergoing an emergency appendectomy.

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