Bright and Shiny Shiny

They have this listed as Alien (this title has been translated from German into English) but the English title is Earthling.

This is a very bittersweet look at the lives of three women, a mother and her two daughters, who are all sad and hide that sadness from each other. The story takes place over a few days as the two daughters wait for their father to return home to begin a vacation without the mother.

The art is done in a smudgy pencil sort of style which works well because you can feel the disconnect the characters feel towards each other and the world in general.