The case does highlight the interesting tension between "covenant" marriage law and recent legislation to prevent adoption of "shariah" law in America. Religious zealots seem to have a talent for tying themselves into knots over their zealotry. The linked piece is an interesting survey of two legislative trends.
In an unusual petition to the U.S. Supreme Court this month, Shawn Lecuona argues that her fundamental liberty interests, including her right to marry and to “worship God according to the dictates of her own conscience,” prevent the state of Texas from applying its no-fault divorce law to her marriage. In other words, she’s claiming that her right to religious liberty should prevent the government from granting her husband a divorce.