Property settlement can be anything you both agree to, but if you had to ask the Court to decide, it will follow a four-step process:
1. What's the value of the shared asset pool?
2. What are the financial and non-financial contributions of each party?
3. What are the future needs of each party?
4. Is the settlement just and equitable?
So, her financial contribution to the actual mortgage (or lack thereof) is just one consideration of many in property settlement. Indeed, many who haven't put a dime on the mortgage still walk away with 65%. The factors that tend to have the most influence are whether there are children to be cared for, whether one party kept house while the other worked, whether one has a better future earning capacity, etc.