He's right: it doesn't sound comforting. Gwenny knows she's just a kid, but she doesn't understand how Martin can tell her that the eye man will leave her be now, when he didn't before. It's not like he's some old man on his porch, guarding his property from brats who are trying to break his windows. Gwenny didn't mean to share a dream with him. She doesn't even know how she managed to, and that makes her want to blame him for it instead of herself. He accused her of trespassing, she remembers that much, but she stands by her response then: she can't trespass when she hasn't left her bed.

Can she?

Martin looks as lost as Gwenny feels, and that should be comforting too, and still isn't. He's the grownup here, and grownups are supposed to be the ones to protect kids, and know more than them. But when has that ever been true for Gwenny? Grownups didn't stop The Grabber from taking those kids. Daddy didn't protect Finney. Mommy couldn't protect herself from whatever it was that made her...

Anyway. She doesn't know why she expected any differently from Martin, just because he's nice.

Oh, fuck. What if he's not nice? He's friends with the eye man. Works with him, even. How can he be nice and be friends with a creep like that?

Well... he'd told her to ask her questions...

"How do I know I can even trust you?" she asks, which isn't how she meant to ask it, but it's how the question came out. "I mean... you're friends with him, right? You seem so nice and he..." She trails off, because calling The Eye Man evil now seems like it would only make things worse. But it's what she's thinking.