The answer rather depends on the identity of 'that person'. But I can say is that this person has an affinity with a saint closely connected with the festive season.
Alas, the opposite is often not true, e.g. when hubby takes a cake or biscuit from a crowded plate in a deserted room and the missus spots this discrepancy immediately she enters. And if a 50p coin is 'borrowed' from her unattended purse ...