Carlos didn't even remember what they had been fighting about. It was something so arbitrary and stupid. But one minute they were arguing, and the next Cecil had dropped to the floor and pushed himself backwards. His back hit the counter and he threw his arms across his face, turning slightly to the side, as if he were about to be hit.
Carlos stood shell-shocked, mouth half-open, as he did not get to finish his sentence. Then he realized what had happened.
As if it would have made his point clearer, Carlos has lifted his right hand quickly in the air, right next to his ear, with his palm flat towards his face, in an exasperated body expression.
And Cecil had flinched. Cecil had thought that Carlos was going to strike him. Carlos worked through theories in his head: he had never hit Cecil, even by accident, so that didn't make sense. Cecil said that he didn't remember his mother or father, so, logically, it wasn't likely that he would have remembered being abused by them. So that would leave a past relationship.
"Cecil?" Carlos asked quietly. Cecil was still on the ground, arms covering his face, squishing himself against the counter in a tight ball. Carlos clasped his hands together in worry, and took a slight step towards his boyfriend, calling out his name again. He could see him shaking slightly.
At the sound of his name, Cecil slowly lowering his arms, taking in deep breaths as he did so. He looked at Carlos, who was standing a few feet away from him with a worried expression on his face. Cecil slowly came to realize what had happened: Carlos was yelling; he had turned toward him, raised his hand, and Cecil just freaked out.
Cecil heard his name called again, and he looked at Carlos, who had taken another step toward him.
"Are you okay?" Cecil nodded his head at the question, and wrapped his arms around his torso. Carlos took another tentative step towards him, and then another, and soon dropped onto the floor beside his boyfriend, slowing placing an arm around his shoulders. Cecil unwrapped his arms from his chest, and clutched to Carlos's shirt, burying his face into his boyfriend's shoulder. Softly, he began to cry.
"Cecil," Carlos said when he had noticed that he was crying. "You know that I would never hurt you, right?"
Cecil's breath hitched, and, after a second, he whispered, "Yes."
Carlos took this as a good sign. After another minute of silence, Carlos asked, "Who was it?"
Cecil knew what Carlos meant, but asked, "Who was whom?" anyways.
"Who was it that hit you?"
"Oh," Cecil breathed out. "It was no one."
"Cecil—" Carlos tried to reason, but was cut off.
"Can we please just go to bed, and forget this whole thing?"
Carlos ran a hand through Cecil's hair, and said, "Yeah, alright. Come on." Carlos helped Cecil stand after he got up, and they both walked to their bedroom. As they started to get ready for bed, Carlos made a mental note to not get into anymore arguments with his boyfriend, especially when they were as stupid and arbitrary as this one had been. Whatever it had been about.
Your OTP is fighting. When the argument gets heated, person A moves their hand to make a gesture, and person B flinches and covers their face. The argument halts as person A realizes that person B was once in an abusive relationship. Person A throws their arms around person B, hugging them tightly, reminding them that they could never hurt them.