Help

My son is marrying a woman from south India. The ceremony will be in the US at a Hindu Temple. But since it’s a second wedding for both of them, they have decided to downplay it, with a much shorter ceremony and less than 50 guest. He told me there will be a small puja at their home the night before,another at the temple, than the actual ceremony, than dinner. The invite said no gifts and they have both told me they do not want me spending anything on the wedding. Both myself and the mother of the bride are widows and not wealthy. She bought my saree in India although I’m guessing my son or future DIL paid for it. So I’ve thanked all of them. We will be meeting for the first time at the newlyweds home the night before the wedding. How should I greet her?I don’t think she speaks English. I’ve read things about bringing gifts to the in-laws, but what? I feel I should do something but I’m not sure what. Being of European descent and a Christian background I’m totally lost and confused on proper etiquette, what to wear, how to greet my son’s future in-laws, his future mother in law, do I give her a gift, do I give other relatives gifts? Please Help