When it comes to colouring skin FlexMarkers have it covered, the brush tip allows for perfection in blending techniques.
I've made a video tutorial showing step be step how it's done and some still pictures to show the build up of different colours.
Step 1. Colour the whole area with Satin FlexMarker
Step 2. using the Blush FlexMarker go around the hairline, across the cheek area, the bridge of her nose, under her eyes and chin.
Step 3. Use Sunkissed Pink on her cheeks, hairline and in the corners of her eyes.
Step 4. Use Nutmeg to deepen the hairline, just adding the very tip to the corners of her eyes and the crease on her nose.