Gluesis seems to have picked her words very carefully. Note she says "she is still hoping you will reconsider", not "I am" or "we are". Looks like all the diplomatic genes went to one side of the family
All these emails have been very cleverly worded, from both Gluezilla and Gluesis, it's almost as if they are designed as communiques by a committee (perhaps explains the delays?). Even the latest is a sort of apology (maybe) but also bids a strong guilt trip.
The dignified, wise and mature thing to do would be to do nothing, but must say I'd be tempted to give her nose a tweak with something on the lines of:
Dear...
Sorry F. is upset, maybe she can see if some of those who are going to the wedding can help her out?
Good luck.
Cheap I know, but I would feel so much better 