A moving moment indeed. The kind lady who got emotional - described by Josine as 'Máxima most faithful fan' - apparently received some bad news earlier this week related to her health.
It seems that HM knew about it already because when the lady offers the flowers, the Queen just opens her arms and says: 'come'. And during the hug she can be overheard whispering: 'I am going to miss you', which brings back a smile. At the end the queen wishes the lady 'strength'.
Edit: full story here:
https://www.ad.nl/show/maxima-ontroert-met-innige-omhelzing-zieke-oranjefan~a6f2e7bd/
Apparently it was Josine who kindly signaled the matter to the entourage of the Queen. The lady will be undergoing treatments to battle cancer, which makes it impossible for her to go to the events of the Queen, as she usually does. Let's hope the treatments will be succesful!