Narang has practical advice: "Remain cautious and remain skeptical.
Meaning, if you have concerns, you have to send Tinder an email or tweet.
Among the red flags are unexplained and implausible charges for: Indeed, some expenditures will stand out dramatically (it's tough to justify Victoria's Secret purchases for a client), but others might not be such obvious markers. In the case of an unusually expensive gas bill, for example, ask about it and listen for nonsensical excuses.
"Cheaters come up with stories, like 'I had to go to Bob's and I knew you'd be mad.'" says Winston.
Denise Winston, founder of the personal financial education website Money Starts Here and a banker for more than 25 years, says she's "seen it all" when it comes to cheating spouses and how their shopping habits have brought them down.
Therefore, she says, if you suspect adultery, gather statements from the past year and scrutinize each line item for funny business.