Yeah, this is pretty much how I saw it. I think there's still a form of manipulation, but ultimately she's trying to turn him into Future John, not keep him fixated on her.

She leads him into an intimate moment, then abruptly ends it (with the knowledge that her inside is "cold," the opposite of what we associate with passion). This helps reinforce for him that she is not human and a relationship is not possible, but still leaves him with enough confused emotions to follow her into the future, where I assume she and Weaver have a kind of "lesson plan" set up.