I normally just keep going until I run out of time or we are completely worn out. Sex is fun and I have no idea why you wouldn't want your life partner to be completely satisfied. Most women will start dry heaving when you get to about the 7 mark and will cum harder with each subsequent orgasm- so keep going. When you get real good you can give simultaneous clitoral and g-spot orgasms. A woman can have many types of orgasm but I've only ever managed to unlock two at a time
Women can apparently have orgasms that wave through the entire body although I've never managed to induce this