If you keep going after the first orgasm, its possible to reach a second, third or more. Clitoral stimulation can produce multiple orgasms, but the most common way is G spot massage. If you reach the first orgasm from G spot massage, ask your partner to keep going until he feels the orgasmic contractions finish. It should last about 5 to 10 seconds. After the orgasm is over you might want to ask him to stop for about 20 seconds. Many women find stimulation at this point uncomfortable. He can start again with hard G spot massaging after this point.
If you keep going like this you may reach a second, third or tenth orgasm. Leave the 20 second pause after each one, but only after the orgasmic contractions are over - don't stop during the orgasm! Again remember to press hard on the G spot - light rubbing won't do anything.