Her priorities are all messed up.
Since she's been in the habit of crying for the last four months she has developed an involuntary pattern of covering her eyes with her left hand as soon as she starts. It's immediate, the hand just jumps up there. She assumes it started for privacy then just developed into the thing she does. It's when she really breaks down, not just for a quick sniffly thing.
It's her move.
The move is not done in front of anyone, she hates an audience when she cries. But, in the shower, staring out the back door, sitting at a red light...
Susan attempted to reenact the move for a pal at work & couldn't. She doesn't really know where her hand goes.
The hand knows but Susan doesn't.
She finds this interesting.