The vengeful sister-in-law who doused a UK bride in black paint spilled the details on the messy family feud behind what she branded a “spur of the moment” attack.

Antonia Eastwood – sentenced last week for the spite-fueled May 2024 outburst aimed at bride Gemma Monk – told the Daily Mail that she is “ashamed” of what happened at the Maidstone wedding, but claimed simmering tensions and jealousy between them had been brewing for years.

The 49-year-old hairdresser claimed the blazing rivalry began when she started dating Monk’s brother in April 2023.

Antonia Eastwood, 49, who doused Gemma Monk in black paint told The Daily Mail she is “ashamed” of her actions.…