Answer is YES.
Because adultery constitutes a ground for divorce in Tennessee, and the spouse asserting this ground has the burden of proving it. It takes more than a mere separation of the parties to terminate the legal obligations voluntarily assumed in a marriage. Because of this, acts occurring after the separation can constitute grounds for divorce. If post-separation adultery is not a ground for divorce, then any spouse is privileged to “move out” of the marital home and cohabit with another without creating a ground for divorce.
Why does it matter?
Divorce is a lawsuit. Therefore, a plaintiff must prove their case. Fault in a divorce can be considered in factors of dividing assets and in child custody. It is a big deal. People are still married until the Judge signs that Final Decree of Divorce. What happens until then matters.
Cartwright Law, LLC