Thomas Rhett's wife Lauren's little sister Macy has been diagnosed with stage three breast cancer.

According to Macy's social media, she was diagnosed in January and started chemotherapy treatment on February 11th. This sad news comes at a time when Lauren and Thomas are expecting their fifth child. The new baby is expected to arrive in early March. "Carrying so much joy and anticipation as well as carrying a lot of heavy and sadness in this season," Lauren wrote in a post on social media.