I would buy some green lipstick and kiss my girlfriend once on each side or multiple times. Stand back to the distance of the shots in camera or on disk and using the same lens & lighting, I would shoot her from similar angles to my model. Then I'd make a mask of those green lipstick marks and change them to whatever color I like and apply them in post to whatever faces I want.

Google search -->   deviant art lipstick brush photoshop


includes  (among others)
    lipstick kiss brushes   by onthinair
http://onthinair.deviantart.com/art/lip … s-26054065
         "16 brushes of different lipstick kisses. zip file includes .abr file and images."


(make note of any use restrictions by the artists)

Apologies everyone I was meant to post this in the hair and makeup artists group but my fat fingers on my iphone hit the wrong group, hence why I deleted my post.  I do appreciate your responses though. I have found the answer to this thankyou.