By her account ... she was there.
May I ask you if you subject sources like this to some sanity-checking?
Not a single nanny mentioned rape whistles in their statements or being advised not to travel alone. If these facets are true, the nannies failed Madeleine totally and utterly by not drawing this to the attention of the police.
Then there is OC management, who, believing Luz to be dangerous in this respect, failed to warn guests and failed to report such facets to the PJ, thus failing Madeleine totally and utterly.
This would take us into massive conspiracy territory, so I prefer to view this unnamed source with extreme caution.
It is relatively easy to attribute salacious stories to unnamed sources. I have no expectation of all the nannies coming forward to claim this is true or untrue. But the paper should have been able to cross-check such 'facts' with other nannies, and appears not to have done so.