Am I Doing The Right Thing?

Hi my sister has just been diagnosed recently and keeps sending me and my family weird messages, I just ignore them because I don't want to make her worse. Am I doing the right thing? I don't want her to feel like I don't care or that I'm alienating her, I think that if I text back it's basically enabling her weird thoughts or making it worse. If you have any experience with this type of thing any advice would be greatly appreciated.
D112 D112
22-25, M
Jan 8, 2013