Adeline thought that she could bear to hear the answer of Theodore to her most dreaded question. But when he said that he had been with so many women that he had lost the count, Adeline just lost it. And when she heard him say the words 'mere mortal women', her blood started to boil.
So in the fit of her rage, she thought of returning back to the Palace by walking. She was ready to walk for hours during the night and through the difficult terrain of the hill, rather than stay another second with Theodore.
So she jumped out of the bed and ran out of the room and out of the safe space. Yes, safe space. Theodore's room and the garden were the only safe spaces inside the Devil's Cave.
She was only safe with the Devil himself because the cave was full of several creatures… dark creatures.