Maddie Marlow and Taylor Kerr and best friends, duet partners in Maddie & Tae and are now in a season of raising children together. Kerr welcomed daughter Leighton in January of 2022, and Marlow’s son Forrest arrived in September of 2023. Now, their kiddo gang is getting another member! With a photo of Taylor and husband Josh Kerr, they shared the news that their family is growing. “Baby BOY joining @taylordye and @joshkerrmusic this fall,” she writes on Instagram. The photo shows mom and dad sitting on the back of a boat, with daughter Leighton holding a collection of sonogram photos in her h…