I've struggled to get back to this, but there's a new chapter up, where Madeline explores public flashing at the instigation of her husband.
It's the last of the "sexy" chapters where Madeline is teased, embarrassed, or has sex. The final chapter is the one that gives the story its name and will take Madeline Beyond the Pale. It won't be sexy, but it will give a big clue as to why Talla behaves so oddly.
I hope to post that within a few days.