Gave it to him
I (33f) recently sold my old house, but can't move into my new one for a couple of weeks. A friend of mine is letting me stay with her and her family in the meantime. I'm really grateful, as it saves me from having to stay at a motel. I'm single/divorced, no kids, so it's just me they have to deal with.
My friend has two boys, one 17 and one 14, so it's a busy environment. I've been helping out with cooking, shopping, laundry, and cleaning as much as I can.
I was doing laundry for myself and the rest of the family when her 14 yo son came in to chat. I asked how his day was and light stuff like that, as I sorted and folded laundry. He saw me take out some of my panties and said, "Those look nice." I said thanks and didn't think much about it. Then he asked me if he could have them. I laughed and said, "Are you kidding?" and it was obvious that he was serious. I thought about it, and finally said, "Sure, here you go" and tossed them to him. I just said "Don't let your mom find them."
I don't know what the kid is going to do with my panties, but he was kind of cute to ask for them. I'm not sure if I did something wrong, but I kind of think that it was okay. Still a bit unsure.