A by-election in the seat of Frankston remains unlikely in the foreseeable future as the independent MP Geoff Shaw faces
The government says only in extreme circumstances can the rules in relation to the four-year term can be breached.
The opposition says it would not fear a by-election, but did not call on Mr Shaw to step down.
Mr Shaw dodged questions by journalists a day after he was charged over alleged misuse of a taxpayer-funded car.
But the Opposition was quick to turn the focus on the Government, accusing it of "keeping Geoff Shaw sweet," so it can stay in power.
Geoff Shaw holds the balance of power in the Lower House and while the Premier insists there have been no discussions to return him to the Parliamentary party, he and the Government rely on his support in parliament.
Ahead of question time in Parliament, the Opposition Leader Daniel Andrews said the government was relying on support from an MP who had been charged by police. "This government is all about protecting themselves, and surviving," Mr Andrews said.
"(It's) not about building a stronger and a fairer State.
"Denis Napthine is only the Premier because Geoff Shaw made him the Premier.
"This Government is only in power because Geoff Shaw continues to support it."
The charges against Geoff Shaw will go before the courts next month, but it could be some time before the case is resolved.
Last night Mr Shaw told the ABC it was business as usual for him.
"I'll be fighting (for Frankston) as I have all the time, and that's what I'll continue to do," he said.
This morning as he headed to Parliament, he told reporters "he had nothing to say."
While there are no indications of a by-election in Frankston, Mr Andrews said he does not fear returning to the polls.
"If we have a Frankston by-election, I'll be out there door-knocking on many houses," he said.
The Premier Denis Napthine says he will continue to seek Mr Shaw's vote and does not expect a by-election before the next election.
"The legislation sets a four-year term and it's very limited circumstances where that four term can be breached," he said.
Mr Shaw says he intends to stay in parliament for his full term.
The next State election is in November next year.
During question time, two MPs were ejected for an hour, as the Premier was responding to an opposition question about Geoff Shaw.
The chamber was in uproar as the Premier outlined his Government's achievements since taking on the top job.
The Speaker of the House called for order, and a short time later stopped the clock.
"It's gone on long enough, the interjections is just plain stupidity, it's not achieving anything." the speaker said.
As the Premier resumed, and the interjections continued, the speaker stopped the clock and ejected the Labor members of Mill Park and Narre Warren south.
They were asked to leave the chamber for one hour.
A short time later, the Labor MP for Pascoe Vale was also ejected from the chambers.