People die in threes ... so the urban legend goes ... but the grandma of "Big Brother" contestant Amber Borzotra is fearless -- despite the fact grandparents of two other contestants died this week.
Producers broke the news to Frankie Grande -- Ariana's bro -- about their beloved grandpa. And Friday night house guest Derrick Levasseur got similar bad news.
Nonetheless ... 64-year old Iris Beverly isn't nervous -- and same goes for her 67-year old husband. She tells us, "We don't believe in curses, when God calls my name I will go."
Beverly adds, "Them dying is a tough coincidence, but he stays healthy walking and I'm a professional piddler."
We made calls to the grandparents of some of the other contestants, but there was no answer.
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