It is never wrong to help another human being. I have, in some instances, spent money for food or, in one case, an inhaler for a sick child (and that was a provider's child, and she offered to come over for services but I was not, at that time, able to meet with her, so I just told her to just regard it as a gift), to people I just meet on the internet. Yes, there are some scam artists, but more often there are genuinely people in need. I feel much better about helping individual people rather than donating to bureaucratic charities where most of the money goes to administrative expenses. I always try to do good and think about other people. That's how I can stand to live with myself. If someone takes advantage of that to rip me off, they are really only harming themselves by not being a good person. I never give, or spend, more than I can afford, and never would, but in the instance where I sent someone food (ordered Chinese delivered to their place) I cut down on certain luxuries for myself that week to pay for it. I say good for you. And obviously, as the woman you made the offer to did not take you up on it, she was hardly trying to scam or rip you off.
I did get "robbed" once by a provider who took money out of my wallet in my place while I was in the bathroom and left. I didn't get angry, call cops, etc. I figured she had her reasons and must have been desperate.
Life is too short to always assume the worst of people. 99% of people are very good. Help them if you can. Five years ago, when I had my stroke, I was lying in a hospital bed thinking I was going to be dead. That quickly puts EVERYTHING into perspective. What's $100 here or there, even if you're relative broke (as I was and am) when you can't take it with you anyway.
I anticipate that there is a person or two on here who will call me naive. I don't care. I'd rather be naive than cynical. That's my 2 cents for today.