Draw with a pencil to draw the outline of the lips. Work from the outside inwards for the upper lip, and from the inside outwards for the lower lip. Use the pencil to correct the contours and the lipstick will then also not run so quickly
Get the subject to tighten their mouth (smiling) to make it full. Draw thin dashes with the pencil and smear them inwards using a brush. Keep the mouth stretched while you apply the lipstick. Take the Lipstick (Pure) out with a spatula and apply it with a lip brush. First colour the middle of the lips and then colour the edges, working from the outside inwards. Dab the result with a tissue to matt it off.
For a fixating lipstick that has a glossy effect at the same time, you can apply Pearl Eye Shadow over the lipstick.