'I'm a 57-year-old model – my grey hair won't stop me from wearing bikinis'
!['I'm a 57-year-old model – my grey hair won't stop me from wearing bikinis'](https://i2-prod.mirror.co.uk/incoming/article33254232.ece/ALTERNATES/s615/1_SPI-EXC.jpg)
Dr Nina Cash, 57, is a mature model who's featured in Sports Illustrated - she's on a mission to show that age doesn't make women any less beautiful, and it won't stop her showing off in bikinis