By LORI OSTLUND

“Tell me what you want, Aaron,” Walter had periodically insisted, the words no longer an invitation but a way of chiding Aaron, suggesting that he wanted too much—or worse, that he had no idea what he wanted. In the beginning of their lives together, when they were two discrete people, Walter’s motives felt easy to read.

: Tell me who you are, he seemed to be saying. Tell me what you want from this life. Only later had Aaron understood that his real motive in asking was to discover how he might serve as benefactor to Aaron’s wishes and ambitions and, in doing so, bind Aaron to him.