Earlier she tweeted that it was awesome to be able to take Tamaki back to church and see his progress.
Hannah told the church congregation on Sunday that she could easily have been a widow after the accident.
Burns were still visible on Tamaki's hands and he said his voice was also slightly damaged from "literally" breathing fire.
"I can still smell the smoke ... I got burnt to 30 per cent of my body. Second-degree burns," he said.
"I got tired of looking at this rubbish and I thought I'd quickly burn it before I go away. And things evolved from there."
All except his torso was burnt in the accident, he said.
Tamaki told the congregation he had written a book about the experience called Living in the Light of Eternity.
Tamaki said he still could not go out in the sun after the accident because his skin was sensitive.