From Crazy Days & Nights
This royal family member was entertainment for some passengers on a passing yacht who watched her having sex on the beach with a guy she met only hours earlier. Sun and booze will do that to you. Do you think her protection people just look away?
The only one I've seen in the press as being on holiday is the eldest daughter of the second eldest brother and the ginger one. She's in St Barts. However, she is with her boyfriend, so this doesn't fit.