Dear, this is a very complicated matter. You should not get annoyed at her. Aged people do have such kind of thoughts. I think you and your DH should try to convince her. Tell her that it’s completely okay to have a baby through surrogacy. Ask her that doesn’t she want to have a grandchild. What a beautiful feeling it would be when she’ll hold her grandchild in her hands. Tell her how much you have suffered. And how badly you want this baby. I hope she’ll understand. Good luck!