A secret Nikāh is a serious violation of the very
meaning which is implied in the word Nikāh. Proper announcement of marital
agreement is necessary for the benefit of both parties.
The situation described by you seems an outrageous form of
conspiracy. In case of unreasonable denial by the parents and relatives, one may
have recourse to the court of Law but no couple has a right to get married
secretly since it endangers the sanctity of the family institution.