Emily Robison is expecting again

Emily Robison is expecting her fourth child, a rep for the musician confirmed.

“She’s excited!” the rep tells PEOPLE magazine. She also added that the baby is due in early September.

This will be the Dixie Chicks and Court Yard Hounds singer’s first child with her boyfriend Martin Strayer. Robison, 39, is also mom to  7 year old twins Juliana Tex and Henry Benjamin and son Charles Augustus, 9½, with her ex-husband Charlie Robison.