*Shaquille O’Neal’s wife Shaunie and mistress Vanessa Lopez are reportedly using the same investigator to dig up dirt about the NBA star for a shared interest in sticking him for every dollar they can, according to RadarOnline.com.

Shaq’s wife Shaunie filed for divorce in November, 2009 and while trying to improve her financial settlement she hired an investigator to find dirt on her husband, a source tells the Web site exclusively.

The investigator discovered Shaq’s multi-year relationship with Lopez, who is now represented by Los Angeles powerhouse attorney Gloria Allred and suing the ball player.

Shaq has a prenuptial agreement with his wife and she needed information that he cheated to use as leverage for a better financial settlement, the source said. Shaunie not only got the leverage by finding Lopez, but approached her with a request that she make their affair public.

Vanessa Lopez

“Shaunie tried to convince Vanessa to go public about the affair before Vanessa did go public,” the source told RadarOnline.com. “And she wanted Vanessa to go to the police too, based on allegations she heard about Shaq harassing her. What she discovered about Shaq and Vanessa, gave Shaunie the ammunition she needed to file for divorce and try to get the money she wants.”

Vanessa didn’t come forward when Shaunie asked her to, but Shaunie’s request set in motion the events that led Vanessa to publicly reveal her affair with the NBA star. It also gave her evidence for the lawsuit she filed against Shaq earlier this year.

Lopez claims Shaq harassed her and even enlisted friends to intimidate her. She is suing him for assault, intentional infliction of emotional distress, invasion of privacy and other charges.

“Shaunie’s investigator turned up emails and voicemails that will hurt Shaq in the divorce,” the source said.

And RadarOnline.com has learned that Lopez now has much of the same material Shaunie does, including voice mails that she believes prove Shaq harassed her and will help her win a civil suit against him.

Shaq’s wife hired the investigator at the end of the summer of 2009.The investigator discovered the affair with Lopez.

“Shaunie wanted out of the marriage for a long time and because of her prenup she wanted to prove infidelity and mental abuse,” the source said. “That would give her more money.”

Shaunie even believes that someone put a GPS tracking system on her car and as she uncovered Shaq’s secrets with her investigator she not only filed for divorce but went to Lopez and worked with the mistress to double team O’Neal.

Lopez was disgusted by the information Shaunie shared and RadarOnline.com has learned that she has several voicemails of Shaq talking about the situation and admitting to some of the things his wife is charging behind the scenes. Those voice mails have been turned over to Lopez’ lawyer.

Now, both his wife and mistress believe they have tremendous leverage against Shaq and both a proceeding with their court actions against him.