Newt is captured, tied up and tortured by someone. Tina storms the place to get him back and no one has ever seen her this fierce. You don't touch Newt, ever, or else you're in for a world of hurt.

I'd like this to be non-established relationship where the two are clearly attracted to each other but haven't admitted it yet. Bonus for Newt being in awe and thinking warlike, protective Tina is the sexiest thing he's ever seen (and is horribly embarrassed later when he realizes Queenie has picked up on those feelings.)