She tells you upon leaving, "Let me know if you need a cure.....or anything else."
Maybe you can be that someone that gives her that "anything else." But I really don't want to know what that "anything else" is, since I am already scared by not only her but the way she says its.
You know that NPC's in this game don't die of old age, right? So if you are just doing it for the inheritance, you are going to have to step up and arrange a little "accident". Maybe she falls in the shower or something?