If you really get no idea what to do, just simply faint and hope
she gives you mouth to mouth, but before, I advice you to forget
this post from Ito_^ :
imagine taking a decaying fish and stuffing it into yr mouth. with
all the person's saliva(i spell corretly this time hor), bacteria,
bad breath, lipstick and all dat sh-it, scarly got leftover from
lunch or dinner, rolling in your mouth like a washing
machine.
if gum bleeding, you might have a taste of blood too.
den you mixes your bateria and all that stuff into hers or his, and
you wonder whether the other person brushed his teeth today. for
those who never clean their tongue, you have all those dirt, making
the tongue yellowish white, and its molesting all over your mouth.
a mixture of your last meal and his/her last meal, and you are
actually sucking her saliva mixture (with unknown particles) into
your mouth, partially drinking it, and putting yrs back into hers
and the endless cycle goes on.
Good luck 
