In September 2016, Middleton released her second book, "Heartfelt", whose proceeds go to the British Heart Foundation. In July 2016, in the Lake District, Middleton became engaged to James Matthews, a former professional racing driver, now hedge fund manager. The couple married on 20 May 2017 at St Mark's Church, at Englefield Estate, Berkshire, near Bucklebury Manor, the Middleton family home. Her niece and nephew Princess Charlotte and Prince George of Cambridge were amongst the bride's attendants. Matthews became a City of London trader in 1995 and in 2001 was co-founder of Eden Rock Capital Management (named after his father's Eden Rock hotel in St Barts), of which he is now chief executive. His father is Laird of Glen Affric, a 10,000 acre estate in Scotland. Matthews' inheritance of the lairdship will result in Middleton "acquiring" the courtesy title of Lady Glen Affric. Their son, Arthur Michael William, was born on 15 October 2018 at St Mary's Hospital, London.