There is so much subtext in today's comic. It's pretty clear that Mrs A is interpreting everything the way that she wants to interpret it. However, she doesn't have to go as far as you might think.
The reason why I say that is because I think that there is a lot of subtext to Brun's innocuous statement: "Clinton... is nice." You could probably write an essay about it but I'll settle for this: That pause makes me think that Brun was struggling to find the right words to express her feelings without saying something that she is worried might be offensive to one of Clinton's family. As the word she eventually used was 'nice', I imagine she was rejecting something like 'attractive' or even 'desirable' (meaning the whole Clinton Augustus package, nobility, honesty and the way he tries to work on her terms as well as being physically attractive to her too).
Panel 4 is wonderful because Brun has that lovely 'human interaction rules sometimes defeat me' expression. I think that, based on Mrs A's misinterpretation of being told that Clinton smelling nice she's suddenly realised why Elliott may have misinterpreted her smelling Clinton earlier.
Meanwhile, poor Clinton's blood pressure surely can't spike any more than it does in panel 4, can it?
Finally, I suspect that Mrs A is rapidly approaching that moment in her life where every word she says to Clinton and Claire is 'grand-babies'.