Just weeks after Louis Tomlinson confirmed he’s going to be a dad, In Touch Weekly has learned of a new bombshell — he may not actually be the father of Briana Jungwirth’s baby!

“Someone very close to Briana says Louis wasn’t the only guy she was hooking up with when she got pregnant,” a source tells In Touch. “She was having sex with someone else at the same time, so the baby may not be Louis’.”

louis tomlinson

Louis with Briana (in the background).

This comes shortly after In Touch reported that he planned on getting a paternity test after the baby’s arrival.

The source adds that the stylist, 23, was seeing the other guy before Louis, 23, even entered the picture.

READ MORE: You’ll Never Believe How Simon Cowell Reacted to Louis Tomlinson’s Baby News!

“Once the baby is born, it looks like Briana will have no choice but to get a paternity test,” the source explains. “The situation is so messed up.”

For more on Louis’ baby mama drama, pick up the new issue of In Touch Weekly on newsstands now!