Duke, I see it perfectly, the Infantas have few activities a year, their role is already small. Infanta Cristina is now the 7th in the succession. We are speaking of saving the dignity and future of the institution... the father can help his daughter as he wants, but the King must safeguard the Monarchy and the Head of State.
The House of the King has reported the Infantas do not have a fixed assignment of the king (they have their work and their salary), the House of the King cover their expenses when they attend an official function. Also they have the benefits and privileges of belonging to the Royal Family. They have a secretary in Zarzuela, which also is involved in Noos. Lately he was working little, and he was more a private assistant of Elena, that a civil servant of the House of the King. So probably he will soon leave Zarzuela, and someone in the secretariat of the queen could help Infanta Elena.
Depending on what happens the Infanta may quit official activity and its privileges, and if the situation is very serious resign her dynastic rights. Her situation would be like that of the sisters of the King. It is also possible to renounce the title of Duchess of Palma, she would still be infanta but Iñaki would have no title.
I also think that Infanta Cristina is the proudest and who more enjoys royal status ... but she is an infanta, since little girl she has been educated to know where are the limits, her husband has broken them and she has looked the other way. So now she will have no choice but to assume the consequences.
I think the king, when they moved to Washington knew there were these problems behind ... but I think he did not know how big the problem really was. The king has to be really angry and disappointed with them.