My friends might tell you, too fond by far... ;-)

...does that woman have a very dark foundation line between her chin and her neck? ;-) ...
] I've heard about women of that period using "paint", of course, ...But why on earth would a portrait painter include that detail to such a degree? ..., is it possible that this particular painting was chosen for this particular book with that mask-like feature in mind? Are we supposed to infer from this that Georgian women were wearing a mask of sorts; that they presented one face to the world which covered up their true one?

...

That's an interesting thought to be sure, but...What I see is rather a woman who is struggling to present a composed face to the world. I can't help but feel that the shade of her nose indicates tears - being recently shed or else barely supressed.
[I am not sure , but wasn't the paint that might drip of her ladyship's face in front of a good blaze rather some lead concoction to whiten the face? You know, the opposite of brown and coarse ;-9]