Ryan Edwards has added another baby to his tribe! The troubled "Teen Mom OG" star welcomed his second child with Mackenzie Standifer and it's a girl! "Welcome to the world sweet Stella! Stella Rhea Edwards came on her own time and surprised us New Years Day! What a way to start our year! We are so in love with her already,” Mackenzie captioned an adorable series of photos showing the couple with their new baby girl.