Sorry, this is just asking for a rude response. So is your grandma your brother/husband's ex because she is pregnant and does that make you and your grandma sister wives? Also, I believe the baby would be your cousin/aunt or uncle/stepchild and half-brother or sister.Your grandma should use a fake name for baby's father on the birth certificate since all of you are subject to arrest. Unless you're from Kentucky where all of this may be legal and you might be related to Mitch McConnell. And that would explain a lot!
Or from West Virginia where it's a family affair. ?