Mouth Study - Pen Drawing

Hi all!

Here is my new art work.
For today's drawing, I tried delving into something different - a study of the human mouth and lips - with my favorite style which is scribbles.

The work depicts a female mouth a bit opened in such a way a few of her teeth and tongue can be seen. It looks quite tempting...

The sketch was done with a blue ballpoint pen on a cardboard paper using scribble style. My steps can be seen below:

Thank you.