Tanya Callau and Alan Thicke
Actor Alan Thicke and his wife Tanya Callau arrive at the 27th Anniversary Sports Spectacular benefiting Cedars-Sinai Medical Genetics Institute at the Hyatt Regency Century Plaza in Los Angeles, May 20, 2012. Reuters/Bret Hartman

Tanya Callau, the widow of Alan Thicke, lashed out at his sons Robin and Brennan after they filed a petition against her Tuesday in the Los Angeles County Superior Court asking to uphold the prenuptial agreement signed between her and the “Growing Pains” star before their wedding in 2005.

The two brothers alleged Callau has problems with the agreement and threatened them to make those problems public in a bid to pressure them.

Callau’s attorney however, Adam F. Streisand, said Robin and Brennan's petition was "distasteful" and a "smear tactic to bully" her.

Read: Carrie Fisher, Alan Thicke, George Michael And 13 Other Stars Who Died In 2016

"Tanya Thicke has never threatened to take private family matters public and she never has," Streisand told CNN in a statement Wednesday. "It is clear that Alan's sons have chosen this distasteful public smear tactic to bully Tanya, by stirring up the tabloid media, filing a bogus lawsuit, and refusing family mediation. Tanya is still grieving the death of her beloved husband and out of respect for Alan's memory intends to handle his son's false statements privately."

On Tuesday, Robin and Brennan — co-trustees of Alan’s living trust —filed the petition requesting the court to uphold the prenup agreement she and Alan signed to “honor the memory of their father, protect his legacy, and prevent his testamentary intentions from being undermined by avarice and overreaching of his third wife, Tanya Callau,” according to the court documents cited by the Hollywood Reporter.

Alan, who died Dec. 13 last year, left Robin, Brennan and Carter William Thicke (son from second wife Gina Tolleson) equal shares of a ranch in Carpinteria, California, the court documents reportedly showed. The three brothers were also given 75 percent of his personal effects and 60 percent of his remaining estate and Callau was left with the ranch's furnishings, 25 percent of his personal effects, a $500,000 life insurance policy.

Apart from this, she was also given all of his death benefits, from pensions and union memberships as well as 40 percent of his remaining estate. Alan also stated she could live at the ranch as long as she bears expenses to maintain the property.

The Hollywood Reporter, citing the documents, further reported Alan updated his trust regularly with the last iteration signed in February, 2016. At the time, his brother Todd was designated as the trustee, and the estate was left with Alan’s sons if the brother did not want the role. And Todd declined, the report added. According to Robin and Brennan, at that time Callau did not make any complaints about the prenuptial agreement or the estate.

"Now that Alan is dead, Tanya claims there are numerous problems with the Trust and the Prenuptial Agreement," the Thicke brothers’ attorney Alex Weingarten wrote in the petition, according to the Hollywood Reporter.

"Tanya asserts that there is no chance the 'Prenup' could withstand legal challenge and that she has very significant community rights in the Trust’s assets and rights of reimbursement with respect to improvements to the Ranch. Tanya also claims 'Marvin rights' asserting that she had to forgo opportunities to pursue and advance her own career in order to support Alan and be his companion and partner, including raising Carter."

Alan died from a heart attack while playing hockey with Carter. He reportedly collapsed at the Pickwick Gardens ice skating rink in Burbank, California. After this he was transported to Providence Saint Joseph Medical Center where he was pronounced dead.