"On the one hand, I was so, so sad to imagine the possibility of my brother being inside there," she said. "But on the other hand, I also felt relieved that if he is inside there, then there will be an opportunity for us to see him again for the last time."
She and her four sisters have been waiting for news of their only brother, Saiful Rakhmad, a father of three.
More than two weeks after the plane went down, searchers located the majority of Flight QZ8501's fuselage
on Wednesday, Indonesia's search and rescue agency said.
The discovery, made using a remotely operated underwater vehicle, has raised the prospect that many of the bodies of the 162 people aboard the flight could soon be found.
Search teams have recovered 50 bodies from the sea in the aftermath of the crash, some of them still strapped into seats.
Officials have said many of the more than 100 passengers and crew members who still aren't accounted for may be inside the fuselage.
Divers looking for bodies
Divers were sent to start looking for bodies in the wreckage Thursday.
"If the bodies are still intact, they will be evacuated one by one," said Supriyadi, an operations coordinator for Indonesia's search and rescue agency who goes by only one name.
But the divers' work has been hampered by strong currents that have reduced visibility at the site, Supriyadi said, according to Indonesia's national news agency Antara.
If the divers' efforts prove unsuccessful, crews may lift the fuselage out of the water, according to Bambang Soelistyo, the head of the search and rescue agency.
Nunung said that recovering her brother's body from the wreckage would be "better than not finding his body at all."
After the plane went missing, Nunung initially went to the city of Surabaya, where Flight QZ8501 began its journey, to wait for news of her brother.
But she later returned to her home in Pakanbaru, a city 1,500 kilometers (930 miles) away from Surabaya on a different Indonesian island.
"We, the family members, do not hold any religious rituals together, instead we individually pray to God for his best decision for us all," she said.
Waiting for answers
Investigators are analyzing the contents of Flight QZ8501's flight recorders, which were recovered from the sea earlier in the week.
The two devices, the flight data recorder and cockpit voice recorder, are likely to help them figure out what went wrong on the plane as it was flying toward Singapore on December 28.
Officials say a preliminary report should be released within a month of the crash. But it's unclear how much information the initial document will contain beyond what's already been made public.
The final report containing investigators' full conclusions is expected to take many more months to complete.
Nunung said she will nonetheless "keep monitoring" the situation, "because I want to know why the plane my brother was on crashed."