Am googling Pink Fog and it's not the sort of fog we menopausal mothers are lost in at all! Esme's mother is the one in a Pink Fog league of her own! Unless she's not Esme's mother. Unless she's Esme's father, dressing as Esme's mother? Because, according to a cross-dressing forum:
Pink fog is the overwhelming urge to do something for your femme side. Example: You go out to get a pair of workboots and along the way you see a nice scarf that you have to have and then a cute skirt, etc. You finally get home with 12 femme items and no boots and maybe no money...
I knew it was an incongruous name.