[1] It was rumoured that she became the mistress of her half first cousin Prince Edward, while she was briefly imprisoned on account of her husband's treason.
By her paternal grandmother, Isabella of Angoulême, Queen-Consort of King John of England, she was niece, in the half blood, of Henry III.
[citation needed] In 1253, Alice married Gilbert de Clare, 7th Earl of Gloucester (2 September 1243 – 7 December 1295).
When civil war broke out and the barons rose up against the King led by Simon de Montfort, Alice's husband supported them.
Prince Edward, who headed the Royalist Army, quickly went to war against the traitors who had betrayed his father.
Through her daughter Joan, Alice was the grandmother of Isabella MacDuff, Countess of Buchan, who placed the crown of Scotland upon the head of Robert the Bruce at Scone.