Quote below from TLDR/recap provided by @MojoDublin
...
holidays -
despite the entriped chatelain living in the same tatty jumpers and busting out of the same dress
the one key principal of filming is .....CONTINUITY
EPIC FAIL
intrepid tattlers saw right threw it ...hypthois is ...between the flurries and the B&B overnight
snortalot BJJ and Charlatan bunked of to paris to view and pay for the
scaffolding paneling.
...
The overnight stay at the randomly-found (cough, cough) rather smart B&B was on the way back from Marc's family home...a chateau furnished in generations of INHERITED belongings and steeped in family history: eat your heart out, Stephanie.
But...
When The Lalande Three went to the Fleuries, it was ostensibly to take FRK to help, advise, instruct Anna in the art of creating flower arrangements, utilising Marie's considerable
lack of skills, talent and experience. I
think they stayed an extra night? Going by what I remember of the food, 1st night was socially distanced cheese, etc in the grand salon, 2nd night P&A produced (delicious looking)steak or fillet of beef and then - as the Trio stayed an extra night due to curfew - FRK cooked supper, taking over P&A's kitchen and deploying her extensive culinary abilities (paroxysm of coughing), for which she appeared to select the menu based on SJ's and BJJ's likes (pretty mannerless to dictate to your hostess what you're going to cook but suppose that's no surprise).
So...
There appears to be a spare day while at the Fleuries for SJ and BJJ Snortalot to go on a covert panel-viewing/buying jaunt, after house tour with Philip on Day 1 followed by a scamper around Honfleur. Which gives "some traction" (© Sewist Sara) to the hypothesis that S and P skiddaaddled on a Secret Mission, leaving FRK to display her unique take on flower arranging while the other two were elsewhere. Paris is 2 hours-ish from Le Fleur, if indeed it's Paris where the panelling was found...who knows.
I could easily have muddied the waters of a very confusing timeline and got it all wring about there being a third night. Trying to unravel, or even keep pace with, SJ's fabulously inventive chronology is an art form in itself!