The sister of a deranged suspect who gunned down three family members in a gruesome Bronx quadruple murder-suicide said she wishes he was still alive — just so she could kill him herself.

Tangier Stukes insisted her brother, Kaseem Stukes, 44, must have been driven by the devil when he blasted his 75-year-old mom, his daughter and her boyfriend to death in the horrific massacre at Castle Hill Houses — a city housing project — on Wednesday.

“If it was up to me, I would kill my brother myself,” the gunman’s sister told the New York Daily News.

“I would wake his ass up, shoot him in the head. Wake him up, shoot him again.”

“That devil was on his f—ing shoulder,” she added. “The devil had to be on his f–king shoulder, talking to him, whispering in his ear.”

The bloodbath unfolded when S

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