So long story short, i dabble with making diy bath stuff and apparently so does my brother's gf of a year and a half. I made the mistake of showing her my stash and now she hits me up all the time about using my ingredients to make stuff. She's been trying all summer to use my ingredients and essential oils to make bug repellent. I've been deflecting her with "oh i have no containers" or like "i don't know the recipe idk if i have the ingredients". I know for one hundred percent fact she has her own stash of at least oils, and a little vodka and witch hazel is not going to break her bank. So she just hit me up again this morning and now i need to know, how do i tell her straight to use her own stuff?

Also not sure if this is the best group for this but seemed right, if anyone has a better suggestion just lmk

Tl;dr my brother's gf is trying to mooch my bath product ingredients and i want to shut it down fir good, but nicely