Later that night, Jaime sneaks into his brother's cell and leads him to a secret passageway that leads out of the castle. Jaime tells Tyrion that Varys awaits him on the other end and that the eunuch made arrangements for escape to the Free Cities. The brothers embrace, believing they'll never see each other again, and Jaime kisses his Tyrion on the cheek: "Farewell, little brother."
Tyrion thanks his brother for his life, a subtle nod to Jaime finally embracing honour over duty.