Mack was shocked when Eden started shoving her back, she had been hoping that she could just intimidate the kid into leaving them alone. That assumption had been wrong apparently, and while Eden didn't do much damage by shoving her in the stomach, she did find it irritating enough to get angrier.
"Fuck off, squirt! You stay the fuck away from my girlfriend!" Mack growled back. She placed her hand against Eden's forehead and pushed the girl back until her arm was extended. "What cha going to do now? Gonna try and reach me with those arms Rex??"