Louis Tomlinson Baby Mama: He Can See the Baby ... But Keep His New Chick Away!!!

Briana Jungwirth says she'll strike a custody deal with Louis Tomlinson, but his new girlfriend is a deal breaker.

TMZ broke the story, Louis and Briana struck a temporary custody deal hours before an emergency court hearing in which the One Direction singer was set to tell a judge she was holding their 1-month-old hostage in order to squeeze more money out of him.

Sources connected to Briana tell us, she's also deeply concerned about Louis' new GF, Danielle Campbell. Briana does NOT want Danielle to interact with her kid, in part because it could confuse the infant and interfere with a critical bonding period.

We're told Louis wants to take little Freddie to his L.A. home and spend time ... with Danielle present. Briana is adamant that should not happen. We're told she only wants Louis to spend time with Freddie at her home.

As we reported, the temporary deal gives Louis modest visitation but no overnights. They're still negotiating child support.