Diffusion is the act of a high concentration going to a low concentration, and vice versa.
However, what happens when the concentrations grind to an ugly, messy halt? I've seen this happen, once too many times.
It's ugly.
Crumbling.
Pathetic.

Every ache ends in another night of weekly wines, and daily sobs; does it help? No.
The light of the TV glow gives her a sense of motel cheapness, like a stain that the dry cleaner can't get rid of.
Is this the act of diffusion?
Yes. Yes, it is.
The self-deserving, overly confident diffusion. It's left its victim drained and powerless. She doesn't sleep anymore.