''khe'' is a retarded way to say ''¿Qué?'' (spanish)
so, ''khe'' would be like an spanish ''wat''
-carla lo siento pero tengo que terminar contigo (sorry but i must broke up with you)
-juan Ah? por que dices eso? (why do you say that??)
-carla oh perdon este mensaje no era para ti amor u.u ... (oh sorry this message wasn't for you baby u.u)
-juan oh que ali- (oh what a reli-)
-juan espera KHE?! :,v (wait wat!?)