Briana Jungwirth has posted a message on Twitter that appears to be aimed at Louis Tomlinson's new girlfriend Danielle Campbell. She expressed her anger at Danielle spending time with her baby son Freddie, who she welcomed with her ex Louis earlier this year.
"You can pretend all you want but you will NEVER be my baby son's mother," the 23-year-old wrote.
The post comes after Danielle and Louis were photographed enjoying a day out in Malibu with the singer's five-month-old baby.
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Briana Jungwirth directed her Twitter post at Louis Tomlinson's new girlfriend Danielle Campbell
TMZ recently reported that Briana became jealous over Danielle spending time with her son, and therefore has prevented Louis and his new girlfriend from seeing the baby on a regular basis.
In response, the Steal My Girl singer filed for joint physical and legal custody of his child.
Just days later Briana, an LA-based stylist, took to Twitter, pleading with members of the public to stop making "hateful and inappropriate" comments about her and Freddie.
Briana is said to be upset over Danielle spending time with her son Freddie
"To all those who feel the need to make disparaging, hateful and inappropriate comments concerning me and my son Freddie," she wrote. "I am sincerely sorry that you all have chosen to focus your time and attention on my son and the life of my son. Surely you have better things to do than pry into the personal life of a single mum and newborn child."
She continued: "I am a proud new mother that is extremely joyous about my child being in this world and have shared that joy with friends and family on a daily basis – often times through social media.
"However, that does not give anyone the right, or the invitation to be nasty and disparaging towards me."
The little boy is five months old
Meanwhile Louis is said to be unhappy at Briana's propensity to share photos of their child on social media, and wants her to consult him prior to posting pictures of Freddie.
The former couple dated briefly last year and in May 2015 it was reported that Louis was to become a father for the first time.