Look how easy it is: the trick is in the “X”
You can use a creamy lipstick in the colour you prefer, a lip liner pencil in the same shade and, an essential, the sable hair lip liner brush, which is superfine and smooth, allowing us to define and spread the colour.
Draw some dots on the outer edge of the lips with the lip liner pencil, joining them by blending with the brush so that you do not notice that they have been outlined. Fill in the inside with a few strokes of lipstick in the same shade.
And for more sensual lips, apply a little gloss in the centre.