Next month, hopefully, but its not a blood relative - my great grandfather's third wife (I'm descended from the second) will be 100. Her sister is 101. The other two sisters died in their late 70s and late 80s respectively, both from smoking related cancers so they got fairly lengthy innings under those circumstances.
His first wife died in 1917 or 1918 from memory so there's some major timespan covered by them
Lost my 95 year old Nan in August, still had all her marbles and was living in her own (council) flat right up to two days before the end - and then the council gave us 1 week to clear it out
Lost my 93yo Gran back in September. She made it to the same age as Grandad. So nervous nineties.
They did get a telegram from the Queen for their Diamond Wedding Anniversary, which in someways has got to be a more impressive achievement I would think.
She was born in summer 1900 so lived in 3 centuries: the 19th (well, she was conceived in it, or born in it if centuries start with '1'), the 20th and the 21st, beat that!