It's not that Fred doesn't like it, not that she doesn't like him, it's that she doesn't understand why she does, when she barely even knows him. She makes a small pleased sound for a second before Jason moves away again and is immediately embarrassed about it.

"It's okay," she says, "We can figure this out. You haven't been in contact with any witches lately, have you? This could be some kind of spell. Not that I'm any kind of expert when it comes to that stuff, but that'd be my first guess."