The estranged wife of Dwyane Wade has filed a lawsuit against his girlfriend, actress Gabrielle Union, claiming that their relationship has caused emotional stress to Wade's two sons.

Wade called the lawsuit "baseless and meritless," and Union issued a statement insisting the allegations are false.

Siohvaughn Wade filed the suit in Chicago this week, adding yet another chapter to the lengthy divorce between the former high school sweethearts.

The couple separated more than two years ago.

Wade's two sons, ages 8 and 2, are listed as plaintiffs.