I was browsing some websites and there is a domme and one of her expectations is for subs to not ask for more than you/they can handle.

in what situations have you been in, as a domme or a sub, in which the sub had asked for more than he could handle? Did you (or the domme, if you are a sub) let you out with what you could handle or less? If she continued anyway with more than you could handle, did it become a good experience or a bad experience? Was she reasonable or out of control, from your or her point of view?