What was the yellow makeup stuff she put on her face?

I thought it was a face mask, not make up.

The primer from urban decay actually has that yellowish undertone ..

It is to tone down the redness in her skin. Maybe because she drinks a lot.

it's, "Foundation". It evens out skin-tone and masks imperfections - women put it on before blush, etc.. She didn't appear to need it -especially the amount she applied. It was almost like she was putting it on as an armor.

"Eventually, all things merge into one, and a river runs through it." Norman Maclean