Time to make a start on her clothing.
As always its important to gather reference on folds and wrinkles before you start.
I have decided to make my first deviation from the concept and instead of Mandy wearing trousers she is going to wear shorts, mainly so we can see more of the leg geometry.
We start with a simple cylinder and position it around her thigh, duplicating it for the other leg.

With these in position we can start to stitch them together and work in more of the upper parts of the shorts, the area which is pulled down.

With the main bulk of the geometry in we can now build in some of the creased and folds.

While doing this also add in the edges of the cloth, and any other details like seams. These small touches make all the difference.
Make sure the pulled area actually looks like its holding some tension, keep it as streight as possible.
We will move onto adding the belt next before doing any final tweaks and details, then we will tackle her shirt.