Sure. She can still keep her J2 if you can keep your J1
If you use EAD based 485, your J1 will expire and your wife's J2 will expire also. If you can still keep your J1, her EAD based J2 is fine.
If you use EAD based 485, your J1 will expire and your wife's J2 will expire also. If you can still keep your J1, her EAD based J2 is fine.