No you are not being unreasonable at all - you are not sure about the relevance of the questions and want to understand your options
The first point is that since you have not remarried you can still apply to the Family Court for the Financial issues to be dealt with if need be.
In addition the Court would wish to see up to date financial details before sealing a Consent Order drawn up two years ago .
Also it would not be wise to enter a remortgage with him - that is just postponing the arguments until the children are older and your case for a larger share or all of the equity is weaker.
The real issue is whether or not you still see this as a good option for you.
Even without his agreement you are certain to receive a larger share of the equity since you have the care of the children and accordingly your work prospects are constrained by child care issues
You will also receive a greater share to reflect the fact that for the last three years you have worked on the assumption that you would not claim child maintenance and the equity would be yours,
Accordingly at this stage you could go back on the agreement and instead have child maintenance plus a larger share of the equity.
Alternatively if in fact you are happy to stay with the initial agreement then you need to write to his solicitors and ask for a copy of the Consent order os that you can check it - and for a Form
D81 which will need to be completed for submission to the court
Point out that you have acted on the basis that this agreement was in place and that if necessary you will apply to the court for the financial issues to be dealt with by way of an Order in the terms previously agreed
I hope that this is of assistance - please ask if you need further details