Lips!

I started on the lips today, initially trying to create a whole new model using Splines- which didn't turn out to well and would have been a nightmare to merge with the face:



I decided to follow the tutorial's way by selecting the edges of the mouth on the existing face, holding shift and dragging to create a lips shape. After welding the vertices of the new shapes together, this is what I came up with:





The texture mapping needs some work, but this could be due to certain vertices not being welded together. I could also create more edges going inwards to add depth.