A young mother urged her husband to die as a terrorist martyr and said their baby son could follow in his footsteps, the Old Bailey has heard.
The couple were arrested at Luton airport in May 2006
It is alleged Bouchra El Hor, 24, of Ealing, west London, encouraged Yassin Nassari, 28, in a letter found in their luggage at Luton airport.
Prosecutors said its significance was noted after missile-making instructions were found on Mr Nassari's computer.
The couple deny a total of three terrorism charges.
Aftab Jafferjee, prosecuting, said they were not merely radicalised Muslims but Mr Nassari was going to engage in "what he and others like him would call a jihad, but what the law describes as terrorism".
"He held both the ideology and the technology with which that could be achieved," he said.
"His wife was not only aware of his intention but positively encouraged it, despite the fact that his actions would almost certainly result in his death in some form of combat and would also result in their son being without a father."
The letter, which was read to the jury, said:
"The moment has come that you and I have to separate for the sake of Allah.
"I am so proud of my husband. I am happy that Allah has granted you the chance to be a martyr.
"I am writing to let you know that you have my support and to remind you to be strong and do not let Satan influence you... to remind you that jihad is now compulsory and we are now obligated to protect Islam, to help our brothers and sisters to fight the kuffar [non-believer].
"I really wish I could go with you because I too feel obligated. I'd like to participate in any way I can.
"Everything happens with the will of Allah. Maybe one day I can follow you. If I can't, I will send our son to you so he can follow his father's footsteps."
Ms El Hor denies failing to disclose information on terrorism and Mr Nassari denies two charges of having documents and computer data for terrorism.
The couple were arrested in May 2006. They married in London in March 2005 and have a one-year-old son.
Ms El Hor, who wore a black hijab in court, is originally from the Netherlands, while Mr Nassari was born in London.
The case continues.