Step 2: Enhance the lips
Let’s first enhance the lips a bit. Make a new layer, take out a soft brush (B) with a dark pink color (#951943) and brush over the lips of our subject.
Next, take the Smudge Tool (S) and smudge the brush strokes with a default brush as shown below. Set the layer’s blend mode to Overlay.
Do the exact same thing on a new layer, but this time, set the layer’s blend mode to Multiply and at 50% opacity.