Can you give any advice?

Hello. I hope it is ok for me post on this board even though I am not a birthmother. I am however someone who cares deeply about an Adoptee. And we could really do with some insight from some birth parents if anyone feels willing and or able to help us. My dear friend is an Adoptee. She strives to respect the choice her birth mother made in giving her up for adoption. The adoption was "closed". My friend did not seek out her birthmother. She liked that the adoption was a closed one. My friend's birthmother "found" her and would like a realtionship or a reunion. That is not what my friend desires. How might she ensure her needs are met yet minimize the distress to her birthmother? She doesn't want to be "rude" or sound "nasty" but she does firmly wish to not have a reunion or a relationship. Gentle statements to that effect have not worked. Her birthmother is persistant. She wishes her thoughts and feelings to be respected by the birthmother but the birthmother persists. She is at a loss, and I have to say I'm running out of suggestions for her.Do you have any suggestions or experience which might help in such a situation? Thank you for your time and consideration. I wish you all well in your journies.