That's what he wanted, I think the same. From time to time he tries to put emphasis on his wife with an odd gesture and the result is confusion because nobody is prepared for the situation. I recall an event earlier this year in Madrid when Felipe did a prize presentation. The honoured guy took his prize, shook Felipe's hand and wanted to leave the stage. Felipe called him back and asked him to shake Letizia's hand too, as if he wanted to say 'please recognize that she's part of the team'. He was probably right that the guy should have done the handshake in the first place but made the situation look embarrassing when calling him back; demonstrating a lack of spontaneity or composure.
I think Felipe's decision of honoring his wife at her special day was rather spontaneous and sweet. It did surprise her, or even the mayor, it's only natural. No one from the press was making a big deal out of it. However, calling the award winner back at the other event was a bit akward.