Comment by CrazyWriterChick on Black Blood 〘Official Mature〙 - Chapter 75

Comment on ChapterBlack Blood 〘Official Mature〙 - Chapter 75
I don't think (hope) Wendy is betraying him. I think (maybe) she was doing her own investigation all along as well and maybe had to cover for that with whoever found out. She seems like a good human. I'm going to hold judgment for a minute. 

Alternate theory...she's worried about his mental health and agreed to evaluate him - thinking there would be nothing to find. Coming from the right place, maybe?