You can see my mind, can't you? Seek the answers you want to assuage your fears.

This is a slippery slope. While part of it is out of the desire to get her to see that he means her no harm, part of it is because he's rapidly becoming obsessed with this bond and how it feels to have Rey in his head. She slips past shields he's had in place for years and he doesn't even mind it; she's woven in with himself now, something that seems like it's always belonged.