I'm not 'looking at small details', you have gaping holes in your story. In order to consider a conjugal application, you need to look at travelling together to a country where you can get married. Complaining that on returns home (that she doesn't need to make), her family examine her documents (which she doesn't need to let them), and objecting to them (which she doesn't have to heed) is not going to get you anywhere.
I understand that you might think she has to visit her family, and cultural norms there allow for more control over her than the west. But you're trying to persuade a visa officer that you are important to each other. As it stands, you look far less important to her than the rest of her family - despite the fact that you need to establish a marriage-like relationship between you in order to get a conjugal sponsorship.
If you cannot travel to another country - and you must try, and get proof of it - then there will be no stamp for them to complain about. If you can and there is, then you will be a married couple, and you should matter enough to her that she will not throw you aside to please her family.
