I believe Jimsgirl may be right, particularly about the ownership of the house.
However, most countries have laws about property ownership, in and outside of marriage.
(This maneuver has been tried before, many times.)
If this is what is really going on, as I see it, you have two options...
...Leave, and let him have his way, financially, or,
...Leave, but ask for your rights in court, first.
In some countries, if you 'abandon the relationship', BEFORE securing your 'rights' and 'obligations', in court, you may lose.
There is another thing to consider...do you have the emotional strength, and finances, to face a court battle? ...Especially if it takes a long time, and may get very nasty?
Every partner to a divorce has nothing to lose by trying for a greater share of jointly or questionably 'owned' property...particularly if they are NOT the partner bringing the suit.
I think you need the best legal advice you can find.
Ask womens' rights organizations for references to excellent lawyers.
You may want references to good personal counselors, too. The best case, in court, has little emotional content, EXCEPT issues of SAFETY, so your best bet is to get counselors to help you sort out what is purely emotional, and what is legal grounds.
Documentation of legal issues is very important. A simple bank statement may tell much of what really happened. Get all the paperwork you can, or a lawyer may be able to get the courts to ask for it.
Division of real assets is a tricky part of a divorce. I am so sorry you have this difficulty.
Whenever there is money involved in a dispute, many people may try for a piece of it. That's just a fact of life, no matter what country you live in.
If your family is wealthy, or if you have good potential earning power, you may be able to turn your back on the money you have invested in this marriage, and save yourself the emotional turmoil of a fight in court.
At the very least, please protect your childrens' feelings.
They are the most vulnerable people involved.
Get excellent unbiased counseling, if you can, and see that everyone is safe.
You have my heartfelt best wishes and support.
Fledgling