1- Ehram is wajib to wear on someone who is performing umrah on behalf of you not on you and all conditions and restrictions applies on him.
2- Ask him to perform the tawaf un Nisa , if not performed then his wife is haram on him and your wife is haram on you because tawaf u Nisa was not done and umrah is incomplete. But while he is in Ehram it is not wajib on you to stay away from your wife.