Pent up rage and loss and suffering and energy was best released this way. He might have requested Sif to stay but she could not be allowed a moment more alone with him until they hit the Capitol tomorrow. She was good at prying things from him and she knew that a good way to do that was to give him pleasure and comfort.

He could feel a discharge when it came to pleasure. It let him think more clearly and the body of this slave, while not ideal at the moment, would come to be precious to him for that relief. He took Steven on his side, arms curled around him, knees fitted into the backs of his knees.

He was tight, tighter than his James, and so much softer too. Thor exhaled sharply against the shell of his ear once he was properly seated to the hilt within him and then stroked fingers across his stomach to feel his abdomen ripple with how full Thor had made him.

"Keep me hard," he murmured. He enjoyed the tease and the way that a slave could use their bodies like a mouth and suck against him. "I wish to lay within you awhile more."

Steven would likely know this now that he was experiencing it himself. He had often been tasked to tidy up the chambers while James and Thor laid like this... Sometimes for hours. And often without release for either.

For Thor; it was like a more intimate companionship. And a way to reconnect to James through this surrogate.