I am married for the last 18 years and have three kids. However our sex life despite a love marriage is very dull. We just have sex twice or thrice a month which is making me desperate and confused. I have tried everything to please my wife but she does not want to indulge in sex. Is my sexual drive very high? Or is hers very low! Please advice what could be done.

Her drive seems to be low. There has to be many reasons behind this. Reasons vary, may be hormonal, emotional, biological, social etc. You have to discuss with her keeping this possibilities in mind and even more preferable is to consult Psychiatrist for counseling and ruling out hormonal problem.