You don't seem to mention how long you knew your wife before marriage : sometimes people who get married before they have really taken the time to get to know each other, find uncomfortable surprises after marriage.
Some actually personally insecure people become very possessive and controlling of their partner. That is never a recipe for happiness. Your wife is also taking a very self-defeating approach, in seeing your sister and family as rivals, rather than a sources of support and assistance for you and potentially also for her. What you are describing sounds like what is often called Pathological Jealousy :someone being jealous and suspicious to an absurd extent, without any sufficient basis for this.
This is always unpleasant, but in your description she takes this much too far, in not merely abusive words and behaviours, but physical violence. This is never acceptable.
It would be useful if you could document the wounds she causes. Does she ever show this violence when others are present ? Witnesses would be useful.
You should not be expected to accept such intolerably cruel treatment, and divorce may well be a sensible idea. You may want to consult a lawyer to clarify your rights and your prospects for a successful application fora divorce ; and perhaps even a court order of protection, forbidding her from any form of abusive behaviour towards her.
Congratulations on having enough scruples to resist the temptation to hit back when she assaults you. It is too often forgotten that women as well as men, can abuse their spouse, and that this is no more acceptable, and the victim of an abusive wife deserves understanding and support, too.
If she had a good professional job, why did she apparently stop work ? She should be able to get a new job and to support herself, and this would give her something better to think about all day than her twisted obsessions about you and your non-existent affairs.
In a less extreme situation, and where she would sincerely agree to work with you with a marriage counselor, it can be possible for such troubles to be sorted out, but it sounds extremely unlikely that she would agree to do so. And you can't fix these marital problems all on your own. Hence divorce may be the best option, to save your own health.
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