They didn't lock their room and were romancing made shagun interupt their romance.
They were discussing Adhi problem and raman felt why was ishu not the bilogical mother of his children. When she saw that she felt jelous and she made sure thier honeymoon trip is cancelled.
They would have locked the room when Raman took back his vows and gifted her the ear rings then the nasty shagun wouldn't have known anything. why don't they lock the room