I think technically you can be regarded as a ftb BUT most of the lenders will require that your wife be on the Title Deeds because this is a Family Home ( a property within which a married couple ordinarily reside) and lenders don't like the difficulty of having a non owning spouse in occupation. Should they ever have to repossess, the non owning spouse can cause difficulties that would not exist if the property was in their joint names.
If its in joint names, you won't be regarded as a ftb.
mf