She must be his wife

"I have prepared your night clothes and towel, Master Lemiel. Is there anything else you need?" Sienna asked after Lemiel went into the bathtub. She stood by the bathroom door, her eyes lowered to the floor.

She expected him to dismiss her as he usually did, but he didn't.

"There's a wine bottle and a glass on my bedside table. Pour me a glass."

Sienna looked at the glass sharply while pouring the wine. She made her way back to the bathroom, a glass full of red wine in hand.

Lemiel ran his fingers through his damp hair when he received the glass. He was leaning on the bathtub, and the bubbly water reached just below his chest.

"Stay for a while. Why don't we have a chat?" he said before she could excuse herself. His eyes gleamed with wicked mirth because he knew she was eager to leave, and he was poking fun at her.