The world has been gripped by the prospect - however remote it might currently seem - of Andrew Mountbatten-Windsor being dragged before the US Congress to answer questions about the Jeffrey Epstein scandal, as apparently the King believes he should.
But too many have taken their eyes off Andrew's ex-wife Sarah Ferguson, whom I believe to be a very dangerous woman now.
Yes, the former globe-trotting Fergie, who has always demanded a lavish lifestyle she could never afford, and who remained best friends with Epstein even after he was convicted - even bringing her teenage daughters into the heart of his paedophile's lair.
As a result of her associations with the disgraced Andrew, she's rightly been cut adrift by the royals. Her charities have cancelled her patronages, her publisher has pulped her latest book, no business wants her endorsement and nobody seems to know where she is.
Yet, as she characteristically wailed this week: 'I need to get back to work - I need money!'
Now the biggest threat to the monarchy is surely that a penniless, homeless Fergie - who's 66 but, after all her self-inflicted problems, is looking more like 76 - is scheming to spill her full royal sob story to the highest bidder.
Why, she must be thinking, shouldn't she just 'do a Harry' and expose all the dirty secrets of the family she's known for decades, since she met Andrew when they were both children?
Remember, Harry got a £16million advance for his own tawdry memoir that did so much to damage the royals, and millions more on publication from global sales. He and Meghan’s Netflix series is reported to have coined them £75million as they dished even more dirt on their own flesh and blood.
Harry called his book Spare - self-pitying Fergie’s title would surely be: I Despair.
And publishers and streaming giants would pay a king’s ransom for her story.
Let me guess: she’d claim she was always a victim, an innocent abroad, caught up unawares in a world of paedophile sex-trafficking, and with no idea why her ex-husband has been repeatedly pictured pawing at young women, some of them teenagers.
Millions worldwide would devour Fergie’s story - myself included.
What else could she tell us? She’s always kept her counsel about the kind of man Andrew truly is - now she might feel she has nothing left to lose. Are the Royals really racist, as Meghan and Harry insinuated? Was the late Queen always the saint we took her for - or a mother blinded by her love for her favourite younger son, whose alleged £12million payment to Epstein victim Virginia Giuffre she supposedly partly funded?
What about Fergie’s famous rivalry with Diana? What did she really know about Charles’s infidelities with Camilla? What about her infamous clashes with Prince Philip, or her true thoughts on the heir to the Throne and his wife Kate?
You thought there was nothing left to know about the secrets of the House of Windsor? Don’t believe it for a second.
Now Fergie, who’s always greedily chased money and lived way beyond her means, may feel she has no choice.
The monarchy is deep in crisis. The toxic fallout from the Andrew saga is poisoning the whole institution, while William aimlessly plants trees in Saudi, Kate is all but invisible after her illness and the King is still battling cancer. Anne, Sophie and Edward are trying to keep the show on the road, but there’s only so much they can do.
Fergie is a loose cannon aimed squarely at the royal ramparts. The only question is: how much money will she demand before she lights the fuse - and fires?