Vaeghar and Aemond will attack at midnight, the east stronghold on Dragonstone

Jace has to bite back a smirk as his mother reads the letter out to her council at Dragonstone. The letters have prevented numerous casualties and none know who the mysterious spy hiding amongst the greens is. Well, none save for Jacaerys.

He would recognize your neat scrawl in a heartbeat. At the first letter he had been almost giddy. As the youngest daughter of King Viserys and Queen Alicent, Jace had grown up loving you. When the war broke out after the murder of his younger brother Lucerys he had stolen away to kings landing and hidden himself in your rooms, clamping his hand over your mouth to muffle your scream. He has simultaneously pleaded with you to abandon your family and wed him and put a knife in your elder brother Aemond's throat. You had refused him, tearily crying that you would never love him and if he left immediately you would not scream for your guards.

Little liar

He knew it was you. By your letters you had affirmed a secret alliance with the blacks, your letters had only solidified his belief that you were a liar. You loved him. Your allegiance was to him, always to your Jace.