(CNN) Police in Portugal want the mother of Madeleine McCann to "confess" to having accidentally killed the young girl, a relative of the family said Friday.
Kate McCann arrives at the police station in Portimao , Portugal, on Friday for further questioning.
The girl's aunt -- who spoke from Inverness, Scotland -- said that the allegation is "ludicrous," according to news agencies.
The police told Kate McCann that in exchange for a guilty plea, "we can guarantee you a two-year jail sentence or even less. You may get off because people feel sorry for you, it was an accident," Philomena McCann said.
There was no immediate confirmation from Portuguese police.
Kate and Gerry McCann have previously denied any wrongdoing. Watch CNN senior legal analyst Jeffrey Toobin discuss the case "
Police on Friday named Kate McCann a suspect in the girl's disappearance and said the girl's blood was found in a vehicle the family rented 25 days after reporting her disappearance, according to a family spokeswoman.
John McCann, Gerry's brother, asked why authorities are only now telling the family about finding Madeleine's blood in the car. He called on police to share what information they have.
He told CNN he hopes "we can move on and get Gerry and Kate exonerated and get back to the focus of where the investigation should be."
A representative for Kate McCann told CNN that police have not brought charges against her.
Kate McCann was seen entering police headquarters in Portimao , a town in Portugal's Algarve region, Friday morning. She was released after more than five hours.
Gerry McCann followed later and was being questioned as a witness, a family representative said.
"The suggestion that Kate is involved in Madeleine's disappearance is ludicrous," Gerry McCann wrote on his blog Thursday.