Today is apparently one of the biggest days of the year for deciding to have an afffair. If Valentine's Day expectations fell short in your relationship, beware!

Cheating is apparently big business, and means millions of dollars to websites like AshleyMadison.com  which caters to married people looking to have an affair. Founder Noel Biderman tells USA Today  February 15th is one of their busiest days.

"The day after Valentine's Day is one of our biggest days of the year," says Biderman, founder and CEO of Ashley Madison, a 10-year-old site that unapologetically caters to "discreet" encounters for the married or otherwise attached. "People are disappointed by their spouses' lack of effort, and they feel especially undervalued when there is a societal expectation of romance. Certain days of the year act as litmus tests for many people in relationships."

Many people apparently use Valentine's day as a measure of their mate's affection, and a disappointing day can send them over the edge.  So if you think you screwed up yesterday, there's still time to make amends today.  Maybe the card should say, "I'm sorry.  Everyday with you is like Valentine's Day!"