Mama Ida Odinga has claimed that Fidel Odinga's son, Allay Raila Odinga, was forced by her mother to drop out of school under unclear circumstances.
According to Mrs Odinga, her efforts to find out the reason have been futile, with the daughter-in-law Lwam Bekele allegedly blocking her attempts.
Fidel survived with Allay as the only child but Mama Ida insists that twins were born by another woman to Fidel, six months after his death in 2015.
In the court case where Lwam wants to be sole administrator of Fidel's estate, Ida complains that her daughter-in-law has since sidelined the entire family.
“That even though the death of the deceased remained a mystery and efforts were made to establish what suddenly transpired, the petitioners herein, kept off from the family,” Ida and Winnie said in a joint affidavit.
They went on: “It remains unclear why the petitioner hastily ran away and kept off the family, whereas, there have been various efforts to establish contacts.”
But Bekele termed the statement “preposterous, offensive and made in bad taste”.
She said Ida was in possession of Fidel’s autopsy report. Bekele accuses her mother-in-law of “unjustifiably and continuously making false, defamatory and/or unkind remarks about her family friends and herself.”
On Monday, reports emerged that Raila was keen not to have the matter published in local dailies, forcing the Standard to recall circulations that had been made at that time.
According to sources, he called KANU leader Gideon Moi, whose family has a stake in the Standard Group, forcing the editorial team to pull down the story.
Mrs Odinga is said to be keen to have two children reportedly born out of wedlock to Fidel included as dependants of their late father's estate.