Dump her.
An hour a year is not worth it.
If she can sit in church for two years with her child and grandchildren and not acknowledge them, then she has clearly shown where she stands on any relationship. You owe her nothing. To lie about a relationship, in church, with her peers, pastor and before God, shows just how much value you really have to her. If having a biracial grandchild causes her feel more humiliated than living 50 years in an abusive relationship, and allowing her children to be abused, she's not worth much as a human being. JMHO
An hour a year is not worth it.
If she can sit in church for two years with her child and grandchildren and not acknowledge them, then she has clearly shown where she stands on any relationship. You owe her nothing. To lie about a relationship, in church, with her peers, pastor and before God, shows just how much value you really have to her. If having a biracial grandchild causes her feel more humiliated than living 50 years in an abusive relationship, and allowing her children to be abused, she's not worth much as a human being. JMHO