Patrick Mahomes and his fiancée, Brittany Matthews, are going to be parents.The Kansas City Chiefs quarterback, 25, and the certified personal trainer, also 25, announced on Tuesday, September 29, that Matthews is pregnant with their first child less than a month after Mahomes proposed to his love.“Mom & Dad, taking a small detour to the wedding❤️,” Matthews wrote via Instagram, alongside two photos of Mahomes holding her stomach, while she showed off the sonogram.The NFL star shared a closeup