Welcome to Health Care Magic.
Thanks for query.
*Just discuss the problem mutually with each other
*ask your wife what does she like and what does she doesn't like
*read a good book written on this topic
*Ask your wife whether she gets pain during sex
*Rule out if she has any stress
,tension or depression
imbalances also result in this problem
*after following the basic guideline ,if she still has the problem then consult a physician and/or a gynecologist
Have a good health