People learn to be indirect as children. Those who do not learn are considered tactless. Well-written dialogue mirrors this reality. Disguising a question as a statement is effective dialogue because it reveals the game being played. Coupling the dialogue with narrative reveals more.
Good writers balance indirect statements with clues to their meanings.
The speaker does not face her lover. A rare but effective form of dialogue is unstated emotion. Unlike other forms of indirect dialogue, the intent is clear to other characters but the words are carefully chosen. As poets know, allusions to emotions are more dramatic than blunt statements. The most common method for employing unstated emotions is to have one character describe another.