By Jane Simpson PUBLISHED: 14:44 EST, 9 February 2013 | UPDATED: 11:27 EST, 10 February 2013 Scottish Formula 1 star David Coulthard admitted he was in 'huge shock' today after his younger sister died of a suspected heart attack at the age of 35. Lynsay Jackson - mother to ten-month old baby girl Emilie Anne - is understood to have endured cardiac failure at around 4am yesterday. The trained nurse, who until relatively recently ran the family’s well-known motoring museum, is understood to have gone to bed complaining of stomach pains before the attack. Scroll down for video Family: Lynsay Jackson (second right) pictured with her husband Will (right) on their wedding day. She is pictured beside her brother David Coulthard and his fiance Karen Minier
@highlight
Lynsay Jackson, 35, found dead at her home in Scotland yesterday morning
@highlight
Police are investigating death but said it is not being treated as suspicious
@highlight
Mrs Jackson previously ran motoring museum dedicated to brother's career
@highlight
Coulthard 'told of death before he appeared on BBC Saturday Kitchen Live'
After his win, the @placeholder driver said: ‘It was my sister’s birthday and she asked me for a win, so I dedicate this race to her.