The fraternity of corporate chiefs ousted over an office romance just added a new member.

Nestle CEO Laurent Freixe lost his job this week after an investigation found he had had an undisclosed romantic relationship with a subordinate. Freixe is not alone.

Whether they are exposed via social media or by a whistleblower, C-suite dalliances continue to cause turmoil atop some of the world’s biggest companies, raising the question of whether internal corporate alarm systems are working — or not.