Female led relationships discussion

This question is first directed at the Doms here. Thank You all for letting me speak to You. Where do you set your boundaries with Your subs? What fantasies are they permitted to voice, if any? And, when allowed, do You let them experience the reality of their deepest desires? Even if those desires don’t interest You much? What is something You would absolutely refuse to do, even for someone You love dearly? Is there anything you thought you might enjoy but didn’t make it a requirement for Your sub? Why not? Secondly, I pose this same query to the subs. What could your Dom demand, or has demanded in the past, that you simply would defy them regardless of what happens. The unspoken rule is that our fetish lifestyles rely on mutual consent and pleasure. But we all possess a dark side. Where lies your boundary?