@ang3lface816
I don't like to say this but there could be Nair in that stuff or some liquid relaxer or worse. I wouldn't trust her either. There's more reasons but I wo t get into that here PM me if you want.
You can
1 Just dump it but she will keep giving you stuff like your some charity case.
So if she gives you more stuff which she probably won't tell her thanks but no thanks you're good.
or
2 you can give it back to her saying I don't use used stuff on my hair that other people give to me whether new but especially not used. You use certain organic black owned stuff etc. Tell her thanks but no thanks.
And put an end to it right there it's not rude you didn't ask her for her old funky used conditioner anyways.
And look her in the eye when you say it too.