She and Ant finalised their divorce last week.
Lisa Armstrong has been given an order to stop engaging in social media attacks against Ant McPartlin’s new girlfriend Anne-Marie Corbett.
The makeup artist has reportedly been given a legal warning after liking tweets attacking Ant’s former PA.
The social media posts accused Anne-Marie of being a “gold-digger”, “backstabber” and “second best”, and Lisa has now been told to stop engaging with the posts in an official warning.
“It’s getting increasingly bitter,” a source told The Sun.
“[Lisa] felt betrayed when Ant admitted he was in a relationship with Anne-Marie, who she thought was her friend.
“She was inundated with supportive comments on social media. She liked some posts but she didn’t expect a legal warning.”
Lisa and Ant finalised their divorce last week but Lisa is said to be unhappy with the financial settlement they came to.
It is reported that Ant offered their £6million London home and £1million cash, however, others say he has offered half of everything.
The pair are now in the middle of a six-week arbitration period as they try and come to an agreement.