If you can prove evidence of cohabitation for the 2 years preceding the settlement application, then your wife may apply for settlement at the same time as you.
But don't be surprised
if the application is refused and in such case do appeal.
If attending a PEO, a caseworker might tell you that your wife does not qualify and may ask you to to apply for self (you) only. In such case, tell the caseworker that you will not be excluding her as dependant, willing to pay for the dependant and willing to accept that she will be formally refused (a formal refusal will lead to a right of appeal, if you withdraw her application you will have no legal recourse).
When is your wife's current leave expire?
