He briefly considers, and discards, an impulse to give her two stab wounds for not telling him that.  He is not pushing himself that far today.

Actually, Keltham finds himself not particularly impelled to re-stab her in the first place. He wants to have sex that hurts her but - maybe not that particular form of hurt, right now?

"I foolishly told you earlier that I would have sex with you with the stab wound later, and should not have bound my future self to that course which my present self wanted.  That was something you might have relied on, though, and I need to hear from you the consequence if I now find some other way to hurt you during sex that feels righter to me in this moment - whether some deep part of you will take that as meaning that you can't trust me, when I say you'll get something you want later, instead of now.  Don't answer from habit; look to the deeper sources in yourself and answer from there."

He briefly considers, and discards, an impulse to give her two stab wounds for not telling him that.  He is not pushing himself that far today.

Actually, Keltham finds himself not particularly impelled to re-stab her in the first place. He wants to have sex that hurts her but - maybe not that particular form of hurt, right now?

"I foolishly told you earlier that I would have sex with you with the stab wound later, and should not have bound my future self to that course which my present self wanted.  That was something you might have relied on, though.  So I need to hear from you the consequence if I now find some other way to hurt you during sex that feels righter to me in this moment - whether some deep part of you will take that as meaning that you can't trust me, when I say you'll get something you want later, instead of now.  Don't answer from habit; look to the deeper sources in yourself and answer from there."