Thad deciphered it letter by letter just like she told him. Nora said it was a surprise, a code for just him. She said to take his time and read it out loud, the question and the answer she would just give away. She couldn't erase the smile on her face. 

'What is the greatest thing Thaddeus can give? ' Thad grinned turning around when he read out the last part. Answering it. 

She actually jumped up and down with joy after that, Thad rolled his eyes before he hugged his mother... Later Nora told Barry what she did and he broke down in laughter as well." I'm proud of you.... Both of you."