It was Karl's turn to be momentarily stunned at the kiss, before he remembered that he was Matt O'Shea, the mechanic ex-boyfriend that had come back once more to regain the girl that he just couldn't shake from his mind.
And it was probably because of those kind of kisses that only she could give that he had come back countless times after all the arguments.
Karl allowed his undercover alter-ego to give Grace a grin before he looked away, eyes lingering on the warm spot on the wall where they were only a minute ago.
He sighed and then started to walk towards where he had came from earlier.