Louis Tomlinson is once again dealing with baby mama drama!

The singer's ex Briana Jungwirth slammed his current girlfriend Danielle Campbell on Twitter yesterday, making reference to her six-month-old son, Freddie Reign, with the 24-year-old One Direction band member.

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"You can pretend all you want but you'll NEVER be my baby son's mother," the LA-based stylist, also 24, wrote on the social media platform.

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Meet my little lad, Freddie 👶

A post shared by Louis Tomlinson (@louist91) on

As Life & Style reported last month, Louis is paying Briana a five-figure monthly sum to cover her expenses while she takes care of the baby. He also pays rent on a four-bedroom home in Calabasas, Calif.

For now, the agreement seems to be working, but a source told Life & Style that there's no formal legal agreement in place.