There's no easy way to put this. She read a chapter of my work first. She got the genre wrong (it's a fantasy, not a sci fi), Ok, I can live with that. She's said she's not read all of it as it got a little too scary for her
(it's a children's book). She said she loved my writing though, cool I though and wants to read more of my work but isn't willing to spend a lot of time helping me as it's 'not her genre'. Then she sent me a book she was working on. She's not sure if it 'safe' for children to read. It's dire. Most of the book is about a child feeling sick, the story starts 3/4 of the way through, it's flat and it's too short. There's so much wrong with it and I'd feel bad telling her all of this, is there an easy way to put it? I'm not an expert but I've read a lot of books. 
I still need a critique partner
Any suggestions? Thank you.