Oh good, it's not just me. Because when I saw it at first I thought it was Bubblegum, but then the wikia said it might be an early ancestor of her, but now that it seems that she's some sort of highlander, I think that was her. Either way, Finn is possibly the ultimate graverobber...after Denzel from Brickleberry.
They kissed though, because even if she was "13" at the time, she's still been around that long, it'd be like if The Doctor regenerated into a little boy and kissed a little girl. She should just be glad Chris Hansen is long dead.