This is definitely comms
Plenty of people have dual citizenship- I have from Ireland as well as a passport
Why the big deal?
And citizenship is not usually granted to a spouse unless you have lived in the country for a number of years. He would have had to live in Greece for at least 3 years.
https://www.dualcitizenship.com/free-consultation/greece.html
I get the fact that they are "celebrities" but all this seems off - the Prime Minister's transport choice - there's more in that IMO