Well, most men in your place wouldnt be complaining - its the partners who would be! Guys usually complain that they finish too early, often even before their partners start to get aroused.
It is all right if the woman reaches orgasm before you. Women can usually enjoy intercourse for some time (or at least not find it painful) even after they have
attained climax. You could use this extra lease of time to attain your own ejaculation (and/or climax). Some women might actually discover that they are
multi-orgasmic during such experiences. However, non-pleasurable sexual intercourse can be painful for the woman. Its improper to continue in such
situations. There are conditions known as delayed/retarded ejaculation and anejaculation in men. These are abnormal conditions that will require
professional help.