Bad blood from the State Opposition's trick that sank Labor's controversial Fires Services legislation on Good Friday will affect the running of Victoria's Parliament for many years to come, according to one Labor minister.

Insults and accusations continued to fly on Sunday after an episode that took state politics to a new level of bitterness, with eight months to go before an election.

Families Minister Jenny Mikakos said Friday's manoeuvre, which sent shockwaves through political circles beyond the state's boundaries was "the biggest act of political bastardry of Parliamentary convention in our Parliament’s history".

Opposition sources say their two upper house MPs who reneged on their agreement to abstain from the Fire Services Bill vote on Friday morning did not set out to deceive the Parliament but were ordered back into Spring Street on Friday morning by the Coalition's 'leadership group'.