Nicola Sturgeon has admitted suffering the 'worst week' of her life after her former husband admitted to embezzling £400,000 from the SNP.Peter Murrell, who separated from Scotland's former first minister last year, has been placed behind bars after admitting his guilt at the High Court in Edinburgh on Monday. The 61-year-old, who was SNP chief executive for 22 years, faces a prison sentence and an unlimited fine after admitting embezzling the party's funds between 2010 and 2022. He will be sentenced next month.He used the funds to purchase luxury goods, jewellery, cosmetics, two cars and a motorhome. Ms Sturgeon, 55, was investigated by Police Scotland about the missing money but the force revealed last year that she would face no further action. She denies any wrongdoing. Speaking at a literary festival on Thursday, Ms Sturgeon said: 'This has probably been the worst week of my life.'The last few years have had some tough weeks for me, but this one I think surpasses all of them. 'Coming to terms with the fact that you spent many years - I spent many years - married to somebody that, as it turns out, I obviously didn't know at all is a really painful truth to process, and I think I'm only in the very early stages of processing it. Peter Murrell was accused of embezzling the funds between 2010 and 2022, a period which included Nicola Sturgeon's tenure as leader and first minister of Scotland Speaking at a literary festival, Ms Sturgeon said: 'This has probably been the worst week of my life Peter Murrell, who was the SNP's chief executive for 22 years, pleaded guilty at the High Court in Edinburgh on Monday Murrell has been placed behind bars after admitting his guilt at the High Court in Edinburgh on Monday