Most Helpful Girl
You're over 18 so chances are you have a part time job or some access to birthday money and such at the least. Just go out and buy some yourself. If you think she will react badly if she finds them then wash them by hand. She shouldn't find them in the wash anyways, shouldn't you be doing your own laundry too? But if you've lied about your age and are under 18 like your writing style suggests, scrape the money together and buy some. If you literally have no way to get the money then you have to ask her. Hope this helps!