Keltham will go on twisting until he expects to be no longer sensitive himself, maybe a little longer because he's having fun; and then stop, to see whether Carissa resumes automatically or waits to be ordered.

Keltham will go on twisting until he expects to be no longer sensitive himself, maybe a little longer because he's having fun; and then let go, to see whether Carissa resumes automatically or waits to be ordered.