How do I navigate this situation?

My boyfriend’s family are living in poverty and I have lots of good quality, hardly worn clothes to spare. I’ve discussed it with my boyfriend and he is ok with me donating some clothes and other nice things I don’t want to his family, to help them. He’s gotten their clothing sizes for me and they’re all around my size. My mum started off poor; and says I’ll humiliate them by giving them too much at once. If I do. They seem thrilled with what I’ve given them. I don’t mean to embarrass anyone, I just want to help. How do I do it carefully, in such a way that I don’t humiliate them?

How do I navigate this situation?
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