I have never been broken as you describe, although I have cried in a session before. For me "Broken" would be a kind of mind control process from some sort of long term sensory deprivation and hypnotic, emotional and physical torture in which I was persuaded to give over total control to my mistress. My mind completely crushed and my life completely in her control perhaps with her using some form of abandonment/exile treatment in which I felt my only recourse was to completely give up everything for her. Of course I could picture some form of highly erotic and sensual play at the end of the process to soothe me and reinforce the bond.
For me that sounds very scary and would place me in a highly coercive situation, but at the same time I have to say I am oddly drawn to the total destructive nature of that scenario. I find my heart pounding at the thought of that! Thank you for introducing that thought!