Los Angeles, CA- Jessica Simpson’s parents Tina and Joe Simpson are splitting up and have filed for divorce. Was their marriage one of convenience?

In the court documents obtained by TMZ, Tina said, “The marriage has become insupportable because of discord or conflict of personalities… that destroys the legitimate ends of the marriage relationship and prevents any reasonable expectation of reconciliation.”

But what is the real reason they are divorcing? If you believe the National Enquirer the couple is estranged because Joe is actually gay. However, considering the source you have to take that assertion with a grain of salt. And the couple completely denies the allegations.

“It’s an amicable split and there is not third party involved. Any other related allegations are completely false,” a rep for the family said.

A source close to the matter told Fox411 that Tina and Joe married because it was convenient. “From what I know they have been separated for a while,” the unnamed source said, “It has been known they weren’t ‘together’ but it seemed more a marriage of convenience.”

Tina filed her papers last month in Texas. In his counter filing Joe insisted that Tina get nothing in the split.

Since Joe and Tina’s children are grown they won’t have to worry about child custody, but Joe’s insistence that she receive nothing in the final settlement could be setting the stage for a lengthy court battle.

An experienced divorce attorney will work diligently to make certain that an estranged couple can reach an agreeable settlement. It is important that couples who decide to divorce and have disagreements hire a legal expert to guide them through the process.