Briana Jungwirth appears to have lashed out at Danielle Campbell on Twitter.
Louis Tomlinson
After pictures emerged of her former fling Louis Tomlinson enjoying a day at the beach with their six-month-old son Freddie Reign and his current girlfriend Danielle, 21, Briana took to her Twitter account to post an angry tweet.
Briana wrote: "You can pretend all you want but you will NEVER be my baby son's mother."
The tweet appeared on the account @realbjungwirth, which, although not verified, has almost 30,000 followers and is linked to Briana's Instagram account, where she often shares pictures of Freddie.
The Twitter account is also followed by Briana's mother Tammi and her cousin Ashley.
Briana's message comes just weeks after it was claimed that her and Louis' custody battle over Freddie was sparked by her jealousy over Danielle, who Louis started dating last year.
Speaking previously, a source close to the mother of one - who gave birth to her child in January this year - said: "Before Briana got pregnant, she was bragging to friends about how serious she was with Louis. She thought it was going to be a real relationship.
"When Louis started dating Danielle, Briana was upset and that's when the drama started.
"Briana really tried to make the relationship work, and she became jealous when he moved on.
"When she was pregnant he was very supportive and paying for all her medical needs. He bought her a house, but she wanted something bigger."
Tagged in Louis Tomlinson