A cousin of Queen Elizabeth II was jailed Tuesday for 10 months for sexually assaulting a woman who was a guest at his ancestral castle in Scotland.

Axar.az reports citing foreign media that Simon Bowes-Lyon, the Earl of Strathmore, had admitted assaulting the 26-year-old woman in February 2020 in a bedroom at Glamis Castle, which was the childhood home of the Queen’s late mother.

His victim still suffers nightmares from the 20-minute attack, in which Bowes-Lyon came into her room uninvited and groped her while trying to pull off her nightdress, Dundee Sheriff Court heard, according to the BBC.

Bowes-Lyon, 34, who is a first cousin twice removed of the queen, pleaded guilty last month, saying he was “greatly ashamed of my actions which have caused such distress to a guest in my home.”