She told party leaders that Aung Kyi had insisted that political change should wait until the government completes its so-called roadmap to democracy.
Nyan Win, an NLD spokesman, said she described the government's position as "totally wrong".
The NLD spokesman said Aung San Suu Kyi was particularly frustrated at the government's refusal to set a timeframe for reforms, saying the people of Myanmar would have to "hope for the best, and prepare for the worst."
Aung San Suu Kyi, who won the Nobel Peace Prize in 1991, has been held under house arrest for most of the past 18 years.
Her party won a landslide victory in national elections held in 1990, but the ruling military refused to hand over power.
"We have to be patient as we have sacrificed for many years," she told NLD leaders on Wednesday.
Her comments came amid reports that one of Myanmar's leading bloggers, Nay Myo Latt, had been arrested as part of what a media advocacy group said was a clampdown on internet dissent.
Reporters Without Borders said Nay Myo Latt, an NLD member who also owns three internet cafes, was detained after writing about the suppression of freedoms following the recent bloody crackdown on pro-democracy protests.
The group said Myanmar authorities had stepped up internet surveillance since early this month, pressuring internet cafe owners to register personal details of all users and to programme screen captures every five minutes on each computer.