Nicely done.

Hmmm, Spike has more self-control than I anticipate.

you need to edit the command word from "sleep" to when I(spike) say sleep, otherwise if anypony said sleep they would go into a trance and Spike would be in Trouble.

When will the next chapter come out

Good story.

I hope you eventually find time and inspiration to come back to this story. It’s a wonderfully depraved and sexy concept and you certainly seem to have the passion for it based on the writing.