Jaya Prada came to the court and remained there during the entire hearing on framing of charges during which a CD of a sting operation was played.
Both Jaya Prada and Amar Singh were expelled from SP in 2010 on the charge of anti-party activities.
A crowd of onlookers and fans of the film star-turned- politician milled around the courtroom.
Amar Singh has sought discharge from the case saying there was no evidence to show that he had induced BJP MPs to cross vote in the trust vote in the Lok Sabha in 2008 in return for money.
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Besides Amar Singh and Kulkarni, BJP MPs Ashok Argal and Faggan Singh Kulaste and former MP Mahabir Singh Bhagora Sanjeev Saxena, Amar Singh's former aide and BJP activist Sohail Hindustani are accused in the case.
The case was registered in 2009 on the recommendation by a parliamentary panel which had probed the scam.
All the accused have been booked under various provisions of the Prevention of Corruption Act and for criminal conspiracy under the Indian Penal Code.