I am male 27 and my wife is 24 years old, its been 4 years we got married, before having a kid we both used to have a good desires of sex and we both used to enjoy it, after having a kid my wife not showing any interest in having sex, if tried to have sex by convincing her she is complaining that its painful, I tired to know the problem and discussed it with her, she is telling she also did not understand why she has a interest, by this I am having a trouble as my desires are going on more, can you please suggest us what we can do to over come this problem.