Mayuree also cited concerns about the next step for Thailand's embattled democracy, with the caretaker government and the Election Commission under the gun to hold the next election.
She noted parliament must open its first session within 30 days of the election, or by March 2, with at least 475 members, while so far, it appears only about 220 members are ready to take office.
"It's quite complicated," she said. "I'm not sure they can do it within 30 days from now."
(Read more: Has Thailand's government survived the gauntlet?)
Legal challenges are expected to start pouring in.
Government supporters say the court system typically favors the opposition in its rulings, Michael Peel, the Financial Times' regional correspondent in Bangkok, told CNBC.
"It has overturned prime ministers who were aligned with the current ruling party in the past," he noted. "The fear is this is going to be an endlessly repeating cycle, where you have an opposition that can get rid of governments, but it can't consolidate its power because it can't command the support of a majority of Thais."
(Read more: We don't mind if we lose 'fair elections': Abhisit)
In the meantime, the anti-government protestors resumed their marches in downtown Bangkok Monday, although Reuters reported that camps at two of seven big intersections blockaded since mid-January were closed, and a third may soon shut down.
While protest leaders said it was done for safety reasons, it may be due to dwindling numbers at rallies, Reuters reported.
The street protests, which began in late October, were triggered by parliament's consideration of a government-backed amnesty bill that could have allowed former Prime Minister Thaksin Shinawatra, ousted in a 2006 coup d'etat, to return home without facing prison time for a 2008 graft sentence.
While that bill was dropped, the protests have broadened to an explicit call for Yingluck, who is Thaksin's sister, to step down and demands for an unelected "people's council" to replace the democracy for an undefined period. In early December, Yingluck called a snap election in an unsuccessful effort to defuse protests.
—By CNBC.Com's Leslie Shaffer; Follow her on Twitter @LeslieShaffer1