Speaking after the match, Robins said: "I apologise to the Wolves ball boy. He didn't pick up the ball and smirked when we scored the winner, I celebrated in front of him - I shouldn't have done that.
"It really annoyed me, but he's a kid, at the end of the day I have reacted, we scored the goal and I went and celebrated in front of him.
"I apologise to him. I do not show emotion very often and before that happened I apologise to him, I don't show emotion very often but that is what the FA Cup does to you. I apologise unreservedly to him."
Wolves boss Gary O'Neil angrily fumed: "He apologised but to celebrate in a young boy's face is disgusting. The boy is really upset. It shouldn't happen.
"I thought it was really important for me to speak to Mark about it because they're just kids doing a job."