Jessica Simpson's Mother Files For Divorce

Tina and Joe were married in 1978. They have no minor children. In the docs, obtained by TMZ, Tina claims she has separate property from Joe and wants to keep it. It's unclear what that property is.

In the county where Tina filed, there are specific rules about how divorcing spouses have to behave toward each other during proceedings -- they can't curse at each other, harass each other over the phone, or physically attack each other ... basically they HAVE to act like civilized adults.

If one spouse violates the rules, they could be found in contempt of court. Joe filed a response to Tina's divorce petition days later, insisting Tina get nothing from the split.