On 16 November 1720, Maria, the widow of the military furir Nils Dullfjär (d. 1718), gave birth to a child two years after the death of her husband.
The 12 January 1721, Maria Ersdotter and Albrekt Dullfjär were put on trial for incest, a crime which during this period was still punishable by death.
The court judged Maria and Albrekt guilty of incest and sentenced them to death in keeping with the penalty prescribed for the offense in verse 11 chapter 20, of the biblical Book of Leviticus.
There was a similar case in Västmanland, where Brita Johansdotter ran away from her husband with her stepson Mats, four years younger than herself, in 1739; they lived in the wilderness together until they were captured, put on trial in Västerås and decapitated in 1741.
Sexual relationship with all kinds of in-laws were considered incestuous by the church: Oluf Svensson and the wife of his uncle, Anna Olufsdotter, were executed in 1704, Erik Ohlsson and his sister-in-law Karin Andersdotter were executed in 1721, Dordi Rasmusdotter and her brother-in-law in 1724, and as late as 1797 Caisa Larsdotter was decapitated for having sex with her father-in-law.