She let her partner be careless in this - now she's breathless lying on the bed, her "O"-shaped mouth it seems still gasps but her eyes already faded. Last orgasm is mixed with dying suffering on her face. Elegant black ribbon is still around her soft neck, right nearby the strangulation line. He noticed what he did when it was too late.
(and he was very very horny. He put out from the lifeless body of his girlfriend and then cums - I decided that cum splatter will look good on her chest)