Now, to make them look full. Everybody likes full lips. Am I right? Sure I am. 
Select the upper lip with the freehand tool, grab the darken RGB tool and get down on it. Darken the outer parts of the lip, so it stands out.
And again, do the same thing with the lower lip. But darken the upper part of the lower lip more, because the upper lip is ’hanging’ over the lower lip. Nice sentence, huh? 
They look full already. But were not over yet.
The highlights…
Freehand tool – lighten RGB – and lighten it in the middle more then in the corners to get a good reflection.
