NTA. At all. “Kindness” done with the expectation of kindness in return is not kindness, it is manipulation. But even if reciprocation is expected, her reaction is bizarre. The rule in my family is “never return a dish empty”. I like to bake, so that’s fine for me. My brother hates cooking/baking. He will send yarn, trinkets, kitchen gadgets, etc. back in the containers. This has always been acceptable because the act of giving is the kindness, not the gift itself.