There are a number of reasons why a woman does not want sex, or does not want much sex, or does not enjoy sex. In order to deal with the problem, you need to try and find the root of it. I realise she probably does not want to, or refuses to talk about it, so here are some reasons for you to think about - maybe you will see her, or yourself, in one of these.
Sexually painful past: Obviously sexual abuse fits into this category, but there are other things that can fit here. If she was in bad relationship, married or not, that was sexual, she may have deep sexual wounds. If she was sexually teased a great deal, even without any sex occurring, that can leave wounds. Even what seemed to be consensual sex can be harmful, as many women feel they can't say no to sex without destroying any chance of getting dates or getting married. If you had sex with her prior to marriage, she may be hurting about that.
Sex is dirty: This idea is alive and well, especially in "good church girls". Unfortunately the message is not that sex outside of marriage is wrong, but that sex in general is wrong. When a woman buys into this, she feels bad if she has sex often, even in marriage. She may also struggle with the fact that she enjoys sex - that makes it even worse, she is a "****" for enjoying sex. Some women avoid sex because they do want and enjoy it.
Stress and exhaustion: Women do not have as strong a sex drive as we guys have, and things that wear on their bodies or minds destroy both their desire to have sex and their ability to enjoy it.
It's only physical: A woman needs sex to be more than a mind blowing [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] - she needs it to be emotional, romantic, and loving. When it's only about the physical, she loses any interest in it. Please note that an [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] proves nothing - [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] is a physiological reaction to stimulation, and given enough stimulation a woman can have an [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] that she neither wants nor enjoys.
Relational problems: It's unusual for a guy to be so angry or upset with his wife that he will turn down sex; but women are not this way. Sex when she is hurt or angry is more painful than enjoyable. Additionally, she needs a good overall relationship with her husband in order to want or truly enjoy sex.
Sending a message: A woman who decides that sex is all her husband cares about (her perception is her reality) may withhold sex, or have sex but withhold herself from really getting into it, to send a message. Or, she may avoid sex because she thinks that having sex sends the message that everything is okay.
Are you being loving and generous? Do you help her out, say nice things to and about her, and spend plenty of non-sexual time with her? Do you romance her, massage her, and give her little gifts? Do you take care of the things that bother her, help with the children, and take up the slack when she is too busy, sick or tired? Do you consider her interests and preferences when you make decisions large and small? Do you take into account her energy level and mood?
If you are feeling sex starved, could your wife get that off your mind by cooking your favourite meal for you, or giving you a nice back rub? You would enjoy those things, but it would not be what you really wanted and needed. When deep needs are not being met, anything else that is done is of little use. Same thing for your wife - it's not how much you give her, it's giving her what she needs.
Sexually painful past: Obviously sexual abuse fits into this category, but there are other things that can fit here. If she was in bad relationship, married or not, that was sexual, she may have deep sexual wounds. If she was sexually teased a great deal, even without any sex occurring, that can leave wounds. Even what seemed to be consensual sex can be harmful, as many women feel they can't say no to sex without destroying any chance of getting dates or getting married. If you had sex with her prior to marriage, she may be hurting about that.
Sex is dirty: This idea is alive and well, especially in "good church girls". Unfortunately the message is not that sex outside of marriage is wrong, but that sex in general is wrong. When a woman buys into this, she feels bad if she has sex often, even in marriage. She may also struggle with the fact that she enjoys sex - that makes it even worse, she is a "****" for enjoying sex. Some women avoid sex because they do want and enjoy it.
Stress and exhaustion: Women do not have as strong a sex drive as we guys have, and things that wear on their bodies or minds destroy both their desire to have sex and their ability to enjoy it.
It's only physical: A woman needs sex to be more than a mind blowing [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] - she needs it to be emotional, romantic, and loving. When it's only about the physical, she loses any interest in it. Please note that an [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] proves nothing - [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] is a physiological reaction to stimulation, and given enough stimulation a woman can have an [bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse][bless and do not curse] that she neither wants nor enjoys.
Relational problems: It's unusual for a guy to be so angry or upset with his wife that he will turn down sex; but women are not this way. Sex when she is hurt or angry is more painful than enjoyable. Additionally, she needs a good overall relationship with her husband in order to want or truly enjoy sex.
Sending a message: A woman who decides that sex is all her husband cares about (her perception is her reality) may withhold sex, or have sex but withhold herself from really getting into it, to send a message. Or, she may avoid sex because she thinks that having sex sends the message that everything is okay.
Are you being loving and generous? Do you help her out, say nice things to and about her, and spend plenty of non-sexual time with her? Do you romance her, massage her, and give her little gifts? Do you take care of the things that bother her, help with the children, and take up the slack when she is too busy, sick or tired? Do you consider her interests and preferences when you make decisions large and small? Do you take into account her energy level and mood?
If you are feeling sex starved, could your wife get that off your mind by cooking your favourite meal for you, or giving you a nice back rub? You would enjoy those things, but it would not be what you really wanted and needed. When deep needs are not being met, anything else that is done is of little use. Same thing for your wife - it's not how much you give her, it's giving her what she needs.