I dont agree with the 'wifely subjection' issue nor the 'man being head of the household' rubbish either but in your case I would take advantage of it; I have a few suggestions.
- Say to her that you wish to take the lead in certain areas and know more about her beliefs; always refuse however to study just her own books; find other sources that could be of interest; never attack her beliefs though. Always refuse to go to the meetings.
- Address your marital problems seperately and for your part do not allow her or your religious beliefs to get in the way of this - try marriage guidance if you think an external view could be useful. She will be being taught that marriage is for life and as long as she isnt being put to any danger will be encouraged to support your 'headship'. She will of course be told that you cannot be a spiritual head but by expressing an interest in her beliefs you keep the key to that area of her life.
- If you still love her, dont leave and do your best to ensure that she feels that she can stay, that way then you can have more of an input into the upbringing of your daughter - find out what times and days the meetings are held and arrange for other activities for her at these times, that way if she is dragged to the meetings when she should be going somewhere more enjoyable, she will not have a positive association with the meetings themselves.
Hopefully this will help
DB74