"We are answering everything and whatever is required. We are cooperating with CBI, unlike many political leaders who don't," Kanimozhi, who was questioned along with Karunanidhi's wife Dayalu at the DMK headquarters here, told reporters.
This showed their intention to "come out clean" on the issue, she said.
Kanimozhi said she was "asked to substantiate" on the statement issued by Kalaignar TV Managing Director Sharad Kumar on certain financial dealings.
Kanimozhi, who along with Dayalu collectively holds 80 per cent stake in the DMK-backed channel, said DMK never pressured the (Central) government on dealing with the case and added that the Supreme Court was monitoring the probe.
"Do you want me toe the BJP line," she shot back when asked if the Congress-led UPA was trying to use CBI against political parties.
Kalaignar TV had recently denied CBI's allegations that there was a connection between scam accused Shahid Balwa-promoted Swan Telecom and the channel, with the agency telling a court that "it has also come to light that there was a transaction of Rs 214 crore from Cineyug Films Private Limited to Kalaignar TV in 2009".
Kumar had denied receiving pay-offs from DB realty, whose former chief Balwa is in CBI net along with former Union Telecom Minister A Raja.