WHAT IS FINANCIAL INFIDELITY?

Researchers define financial infidelity as 'engaging in any financial behaviour expected to be disapproved of by one's romantic partner and intentionally failing to disclose the behavior.'

It includes secretive purchases such as using cash; keeping a personal rather than a joint credit card; choosing concealing packaging; and shopping at generic rather than speciality stores.

Masking spending, shielding accounts, shipping in plain brown boxes, and burying an indulgent expenditure within the receipt from a big-box store are just some of the lengths to which people will go to avoid leaving a trail of illicit spending, according to a report.

To combat the financial infidelity, experts say it is important to communicate well. 

Being on the same page with both joint and individual goals are important, as is budgeting for occasional indulgences.