Well Manson obviously isn't the jealous type, probably because he fucks a million groupies a night.
She's only trying to be as 'shocking' as her boyfriend. I don't know if this is who she's always been, or if she's just a try-hard, because she used to be a shy, lovely lady.
The colour of her dress just happens to be the colour of my face while watching her and Manson molest each other in 'Heart Shaped Glasses'.