O negative

Cassie • Married to my high school sweetheart💏 🎀Avianna Estella 7/31/18🎀 💙Levi Antonio 02/26/20💙 God is good🙌🏼

Anyone have to get the rhogam shot at 28 weeks? My blood is o negative and so it my husbands? So I’m not sure why I need it?