Contacts are continuing between the Taoiseach's office and Sinn Féin on a possible meeting between Enda Kenny and the four individuals involved in the IRA investigation into the rape of Belfast woman Maíría Cahill.
DUP deputy leader Nigel Dodds earlier called for a "full and proper" investigation into allegations that sexual abuse was covered up by the leadership of Sinn Féin.
He told the House of Commons that there must not be a "whitewash of the black sins of Sinn Féin" in relation to the allegations.
Ms Cahill has claimed that Sinn Féin covered up her allegations of rape by a suspected IRA member.
Last week in the Dáil, Taoiseach Enda Kenny said her story would have serious consequences.
Pressure is continuing to grow on Sinn Féin president Gerry Adams who has insisted neither he nor his party were involved in a cover-up of her allegations.
The Dáil is set to debate the case on 4 or 5 November.
Ms Cahill claims she was raped as a teenager in 1997 by a member of the IRA and later interrogated by the organisation.
Mr Adams was asked by the Taoiseach last week if he was aware of any people moved to "this jurisdiction" – Donegal or Louth – who were involved in the sexual abuse of women in Northern Ireland and who were still in the Republic.
The Sinn Féin leader rejected "in the strongest possible terms" the "entirely malicious and spurious" allegations that he had information about abusers being moved from the North.
Mr Dodds raised the case in the Commons this morning during Northern Ireland questions.
He asked Northern Ireland Secretary of State Theresa Villiers: "Do you agree that no amount of waffle or self serving platitudes from Gerry Adams or the Sinn Féin leadership can distract or take away from the awfulness of these crimes and the need for them to be brought fully to light?"
Ms Villiers agreed any abuse or sex crime was "appalling" and went on: "I entirely share your concerns about the allegations made by Maíría Cahill.
"It is genuinely a very shocking, disturbing and distressing case and all such crimes, whether they are the acts themselves or any sort of cover-up, should be fully investigated by the police.
"Of course there is an independent review set to take place in the way the original case around the allegations ... was handled."
But Mr Dodds refused to let the point go, adding: "Would you understand the concern and anger of people right across the community in Northern Ireland about ... allegations against Gerry Adams about the cover up of sexual abuse by his brother.
"And he's refusing to go to the police or alert people as to what was going on within Sinn Féin and the Republican movement, putting other children and other people at risk. We still haven't the publication of report by the PPS (Public Prosecution Service) or the police ombudsman.
"Would you accept there can be no whitewash of the black sins of Sinn Féin in relation to sexual abuse and paedophilia?"
Ms Villiers replied: "These are indeed shocking crimes and shocking allegations. I would certainly urge Sinn Féin to answer all the questions that have been put to them about this very disturbing case."
