NBA stars who are tempted to step out on their wives might want to think twice.

TMZ.com is reporting that a “secret underground society of trained spies,” otherwise known as the wives of NBA stars, are responsible for informing Vanessa Bryant about her husband Kobe Bryant’s alleged extra-marital dalliances.

Sources tell TMZ.com that Bryant’s teammates “were blabbing to their women about the superstar's exploits” and, in turn, the wives told Bryant’s better half about her husband’s affairs.

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Despite being sworn to secrecy by their husbands, the wives of NBA stars “all share information about other guys around the league” as a sort of insurance policy, so that information “will get back to them if their man ever steps out."

Vanessa Bryant filed for divorce on Dec. 16 citing "irreconcilable differences."

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"(Vanessa’s) been dealing with these incidents for a long time and has been a faithful wife, but she's finally had enough," a source told TMZ.com. "This one is the straw that broke the camel's back."

The couple had been married for over ten years.