Draw the corners a little closer, smooth out the sharp corners. The correctness of the design can be checked by, if possible, drawing straight lines to the corners of the mouth along the edges.
At the end of the article I have placed photos with and without proper lip makeup.

The second error and how to fix it:
This is a rounding of the lower corners of the mouth. This remark is relevant for mature ladies who have already shown age-related changes in their lips, such as drooping corners of the lips, the appearance of fine wrinkles. Such makeup makes the lips look plumper.
Fixing the error:
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