My househelp asked me for a cigarette. Was I wrong?

I know this sounds weird I felt the same. Our househelp is a married woman with grown up kids and has been working at our place for more than 15 years. We trust her and she's more like a family member now. Recently my family went out for a few days and i was home alone for few days so i thought of enjoying the freedom and got a pack of cigs at home only because I had the freedom. Surprisingly, I left the pack in my washroom and my househelp saw it, and came straight to me while I was in my room and asked me if should could borrow a cigarette. I thought she would complain about it to my mom but she didn't and asked me for a cigarette instead. I told her she can take it, she opened the pack and asked me "can i take 2 instead", I told her to go ahead. Then I had to ask her " Do you smoke aunty? " She replied "Yes but don't tell your mom". I was like okay you take those cigs and enjoy. I later found her smoking in our balcony, she cleaned up everything and thanked me for the cig. I'm feeling weird about this. I don't want her to blackmail me later about this. Should I stop giving her cigs if she asks for them again? How can I protect myself in this situation?