Meraj Khan is also seeking to become the legal guardian of the teen, who lives with Ansari.
Ultimately, the probate judge granted Ansari's competing request to administer the estate but has yet to decide how to divide the assets, including the lottery payout. The assets remain held up by the court proceedings, and Ansari denies removing any of the assets.
Ansari's probate attorney could not be reached for comment, and the lawyer representing Khan's siblings declined to discuss the case. Imtiaz Khan also did not return a phone message.
The next status hearing is scheduled for Jan. 24.
Ansari spoke to The Associated Press on Tuesday at one of the dry cleaning businesses her husband started. Ansari would not talk about the circumstances of her husband's death, saying it was too painful to recall. She said only that he fell ill shortly after they ate dinner together.
She said she cannot believe her husband had enemies and she has no idea which family member asked authorities to take a deeper look into his death. Authorities have refused to identify the relative.
Khan had planned to use his lottery winnings to pay off mortgages, expand his business and make a donation to St. Jude Children's Research Hospital.
Ansari and Khan were both born in the southern India city of Hyderabad and immigrated to the United States as adults.
Khan bought his winning instant lottery ticket in June at a convenience store near his home. It was a $1 million winner, but he opted for a lump sum. After taxes, it amounted to about $425,000, according to the Illinois Lottery.