Pretty much: "I was getting lightheaded from being too hot, and could not manage to fix my body temperature while not being affected by my body temperature."

It's rude how despite being a Lyctor, her body does not do every single little thing she wants whenever she wants it. How dare.

"Yes," Harrow adds, as regards Gideon,and tries very hard not to smile. Because the Reverend Daughter of Drearburh does not smile over a person. "She did. Swordless, though."