He doesn't tell her this secret. He lets her live in his house. He lets her use his car. He sets up a bank account for her. It's odd. Also, I feel the story lacks any meat. Nothing really happens. They hang out, but not much is said. I did not feel there was much to the story. Also, the ending was very disappointing. I won't spoil it for you, but I will tell you that I was not happy.
I read this book as a review request via PDF on my laptop. All opinions are my own. I was not compensated for this review in any way. Sorry there isn't more to the review, but there isn't more that I feel.