The Winds of Winter
This information has thus far been released in a sample chapter for The Winds of Winter, and might therefore not be in finalized form. Keep in mind that the content as described below is still subject to change.
After Princess Arianne Martell and her party disembark from the Peregrine at Weeping Town, Arianne sends Feathers to the Drunken Dornishman in order to gather intelligence, as she knows its common room is rife with rumors.
In the Drunken Dornishman, Feathers hears men muttering that Jon Connington put Ser Ronnet Connington's brother, Raymund Connington, to death, and raped his maiden sister, Alynne Connington. Ser Ronnet is said to be rushing south to avenge his brother's death and his sister's dishonor.