Harder, more painful, more purpose behind it. It helped. Peter grunted as Robin kept going, her point hammering home more strongly than before. He felt it build up, every slap adding onto the other before it could disappear and working its way to claw around his brain. This was right, and he needed every bit of focus the punishment was bringing in order to place his attention solely on Robin. She needed him to listen, to take it to heart, and he would. Peter would do anything to make sure that he would.

It was like falling into a rhythm. Her words were a metronome and each punctuation had him repeating her point like a mantra until the next one struck home. His head still wouldn't quite wrap around the idea, that Robin loved him as equal as her husband and this wasn't just something they were doing for her entertainment or fulfillment. She cared about him and slowly she would make him understand.