OK Gilles. I would imagine however that she did propose, or more likely demand an upgrade (as probably it was the only place where seats may have been available) and the Purser refused. Maybe because they were reserved for crew rest. It all boils down to with what sort of attitude she presented her problem. With the French you generally get as good as you give, and it must have become personal. I've seen it personally a number of times between pax and cabin crew.