If she goes ahead and this is dealt with by a reasonable firearms officer, I doubt your licence would get revoked. If she doesn't have a specific safety concern regarding you being a particular danger to yourself or others, what would the grounds for revocation be? That your wife changes her mind about not liking firearms? If she does have a specific safety concern regarding you being a particular danger to yourself or others, then you may find yourself going to court for a firearms prohibition order. Hope she's prepared to foot your legal bills...