Emma Roberts got extremely emotional Tuesday, but BF Evan Peters was by her side -- on the heels of news she'd been arrested for a domestic violence incident involving him.
Emma was seen bursting into tears ... as Evan comforted her outside a New Orleans studio.
TMZ broke the story ... Emma was arrested July 7 in Montreal after she and Evan allegedly fought in their hotel room. Police say there was evidence she'd bitten him.
Evan did not want to press charges, and Emma was released.
Sources close to the couple tell us not only are they still together -- but they're working together on "American Horror Story."