Late Sen. John McCain’s 106-year-old mother Roberta McCain will attend her son’s burial and other memorial services for him in Washington this weekend, it was reported on Wednesday.

The former Arizona Republican and Vietnam prisoner of war — who died at age 81 on Saturday following a year-long battle with brain cancer — will be buried at the Naval Academy Cemetery in Annapolis, Maryland. His funeral will be held at Washington National Cathedral on Saturday.

John McCain had two siblings: sister Sandy and brother Joe. His mother Roberta married a Navy admiral who served in three wars.

In his 2005 book Character is Destiny, the late senator said his mother “remains a great influence in my life.”

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“My mother was raised to be a strong, determined woman who thoroughly enjoyed life, and always tried to make the most of her opportunities,” John McCain continued. “She was encouraged to accept, graciously and with good humor, the responsibilities and sacrifices her choices have required of her.

“I am grateful to her for the strengths she taught me by example, even if I have not possessed them as well and as comfortably as she does.”

Roberta McCain appeared alongside her son at several rallies and even for some television appearances during his 2008 campaign for president. She had an identical twin sister named Rowena Wright who passed away in 2011.

Former presidents Barack Obama and George W. Bush are both set to deliver eulogies at McCain’s funeral.