Her brother, Nagaenthran Dharmalingam, is set to be hanged in Singapore's Changi Prison. If it happens, it will be the first execution Singapore has carried out since 2019.
"When I'm alone and I think of my brother, there is pain. But [we need to] be brave and keep on praying - anything can happen," she told the BBC.
Nagaenthran is due to be hanged on Wednesday morning, but was granted a last-minute stay of execution for a day. A court of appeal will decide his fate on Tuesday.