My son and daughter-in-law will not speak to my husband or I and since my oldest granddaughterwas born they said they they didn't want us to see them so much Now all of a sudden they won't let us speak to them or the kids fearing the kids would look upon us as second parernts I live in New Hampshire do grandparents have any visitation rights. My heart is broken

In some states they do. But to enforce those rights you would need to file suit in Family court. Consult a family attorney in your area.