He felt the tip of Batman's cock slide deeper into his throat, which made Robin's eyes narrow slightly, but he took it as a challenge that had to be overcome.
"G-Ghh..."
It wasn't long before a large bulge formed in his throat each time he took Bruce's cock.
Robin's blue eyes were fixed on the face of his mentor, whom he so admired. He cupped his lips around Batman's thick cock and buried his face in it.
"N-Nnnm..."