Stepdaughter Jenny Simons of Beechboro, and other close relatives, celebrated her 100th birthday at Midland Nursing Home.
Mrs Langelaan has four stepchildren, 11 grandchildren and 13 great grandchildren.
�When mum married dad all those years ago she took on four teenagers, which must have been quite a challenge,� Jenny said.
�For the past 15 years mum has had Alzheimer�s and so she lives in the present, but she knows me when I squeeze her hand and tell her my name,� Ms Simons said.
�She is a gracious lady with beautiful manners,� Jenny said.
Her stepmother worked as a dietician at Perth Royal Hospital for more than 30 years, and then at country WA hospitals for another 15 years.
Most of her life she lived in Beechboro, cared for by Jenny in later years before she moved to the nursing home.