My step sister offered me to find a GF.
I thought, shat ahe will fuck it up, but damn...

She thought that a: 35 years old, single mother, vegan teacher would be a great offer.

Damn, I think she's gone completely insane.

I am still so disturbed by this. She is a dumb hippie, but is she totally apathetic to my well being?

There are 2 options:
Either:
She is so brainwashed, she does not realize, that I might also want to have kids of my own one day, I might also preffer a woman without serious mental issues, AND I might want a wife who will not torture me for eating a food, that is 3/4 of my caloric intake.

Or:
She is truly malevolent. She cared about her friends more then about her step brother, and hoped, that I won't notice, that that kind of person would ruin my life.

Is is still even possible to not rule out stupidity in this extreme case?