Well, he did call dibs. Five more points.

Sarah was bent over without any resistance. “Hey,” she said, surprised at how soft her own voice was, “What are you doing?”

The Bro behind her undid her bikini bottom and let it fall to the ground. “I called dibs,” he said, as if that explained it. She heard a pop as he uncapped his marker, and was about to stand up and put an end to this when she felt a tiny pressure on her lower back.

She froze under his marker as he made the first vertical line of the D. Was this it? Was this how she gets claimed? By a drunken frat boy in a public bar? As she asked these questions, she felt him finish off the first letter with a swooping curve, and a blush came to her face.

She wasn’t his yet! He only finished one letter! She could still escape, and anybody who commented would know that she got away before being totally claimed. But then she felt the first long vertical line of the K being drawn, and something warm built in her stomach and between her legs. He was halfway done now. And as he made the first diagonal notch of the K, she wondered if Lisa had gone through the same internal monologue when she was getting bent over, marked, and pumped full of DKM cum. The bro finished up the K, and Sarah unconsciously reached up to undo her bikini top.

As that last piece of fabric fell, leaving her bent over completely naked, she felt him make the first vertical line of the M. It was as good as done now, and Sarah no longer possessed the willpower to even entertain the idea of escape. Instead, as the tiny felt tip traced out the V-shaped lines along her skin, she quit trying to hold back the feelings of arousal that were building within her. She let out a sharp gasp as he made the last vertical line, finishing off the final letter. Her skin now proudly proclaimed her as DKM property. And as she heard the bro pull down his shorts and felt the head of his rather large cock plop down onto her ass, she knew the same three letters had been marked somewhere much deeper than her skin. It wasn’t just her ass that belonged to the Bro behind her, but her very soul.

She orgasmed instantly as the Bro sunk his cock into her in one sure stroke. “Fuck,” she gasped. He was as big as she imagined he would be. He thrust into her hard and fast and she couldn’t focus on anything other than the pleasure. Her gasps and moans were just as submissive and pitiful as Lisa’s had been, and when she glanced up to meet the eyes of her younger sister, Lisa could only give a look of understanding and arousal. They were both DKM sluts, now. Sarah looked up into the mirror and saw Beth and Felicia giving shocked, mute expressions, and she briefly wondered which of them would be the next to be claimed by DKM.

There was no more thought after that. Just a series of increasingly hard and rapid thrusts, another orgasm, and finally a pulsing in her pussy and a flash of light as her Wall of Shame photo was captured, cementing her place as a DKM cumdump, and earning DKM another five points.