He said one member of AshleyMadison.com has had five or six affairs going at once, yet he is adamant about "never spending a dime." What he offers women, Biderman said, is his attention.
"That's his approach, and he seems to be wildly successful," Biderman said.
Houston said those who do shell out big bucks on their affairs often leave a paper trail. Tax returns, she said, can prove especially revealing: They can alert a spouse to bank accounts they didn't know existed or to the sudden sale of stocks, profits from which, Houston said, might be used to pay for extramarital expenses.
Houston said that cheating spouses will often hide credit card statements from their partners. If you do have access to your spouse's bill, Houston recommends checking for gift purchases, especially around Valentine's Day.
"If he's buying gifts for females, is he really buying $300 worth of lingerie from Victoria Secret for his mother?" she said.
"You don't want to be come paranoid," she said, "but you do want to be aware of the types of things that could indicate trouble."