>as evening washes over fading daylight
This phrasing is redundant. It being daylight is already implied by fading. Just say light.
>a thin, fleece throw-over from the backseat, covering his lower body
First comma is unnecessary, and I'd consider changing to: a thin fleece thrower-over from the backseat.
The last part isn't really needed. It's already implied that he's putting it on his body.
>Already with his head to pillow, the driver's seat is fully reclined and receded.
Very awkward. Consider changing to something like this: He rested his head on a pillow in the fully reclined and receded seat.
>the floor below it
Drop the it.
>plastic bottles, mostly water and coffee
Comma splice. Use a dash if you want to keep the phrasing.
>The backseat is divided in two;
Use a colon here.
>Lord
Lawd. Have to keep your dialect consistent now.
>It'd be too weird after her and his few hookups in the past.
Exceptionally awkward phrasing. The subjects are already implied. Just say: It would be too weird after a few hookups in the past.
There are more things I found issue with, but those are the main offenders. It's decent overall, I suppose. I'm not too sure what the point of it is, though. Reading about a homeless bum is not very interesting.
Really really bad with grammatical issues attacking me from all sides. I guess i'll just go through the biggest offenders.
>Obviously that hasn't been the initial intention and that was made clear by her aghast expression and the awkward try to fix the mishap by bunching the fabric upwards
Should be : That was not her initial intention, which was made clear by her aghast expression and an awkward attempt to fix the mishap by bunching the fabric upwards.
>her face grew dark in anticipation of the turbulences this one hasty gesture will cause
Misspelling and grammar issues abound. Change to: Her face became dark with anticipation due to the turbulence that this hasty gesture would cause.
>with a weary sight she got down from the step, gathered her skirt, only to come back with
Comma splice. Change to: With a weary sight she got down from the step and gathered her skirt, only to come back with
>only needed seconds to think about how
To think of how.
>after she has put everything back in the box, she paused a moment to look at her work, a short smile crossed her mouth, before she was gone again
Comma splice. Change to: After she had put everything back in the box she paused a moment to look at her work; a short smile crossed her mouth before she was gone again.
You could put a comma after box and mouth in my rewrite, but they are not necessary. It's overall pretty bad and awkwardly written. Seems like the writing of someone who just started writing. Don't let that discourage you, though.