Huh. Hadn't considered this. I figured it would eventually come up in SJI but as an unavoidable plot element. Now, I'm not so sure.
Just as transformation is interesting to play around with, it might be an interesting workaround for an actress who becomes pregnant. *shrugs*
It depends on what you enjoy. I find breeding kink to be hot; a lot of other people find it a turnoff. C'est la vie.
In the same way that some of my favorite ladies portrayed in these stories are those who are enthusiastically in to the mind control, it's quite hot when the ladies in stories based around breeding kink are enthusiastically in to the breeding kink. And, since this is a site for mind control erotica, here's hoping we eventually see a story with a woman mind controlled into a breeding kink...