"Oh..." Amber reached down and wrapped one hand around her mercock. "Oh... I... This feels... Oh..." her voice was thick and husky.
"Wow Steph," said Lauren, "diving in with both feet aren't we?" Lauren kicked her tail a bit. "You know, metaphorically speaking."
"I wanna..." Amber licked her lips, "I wanna try it out..." She looked at you and smiled with a raised eyebrow. "Do you?"
You nodded and Amber swam over to you. Molly backed off, staring at Amber with wide eyes. However Lauren stayed right where she was, willing to still be behind you in the mermaid sandwich. Amber wasted no time in starting to kiss you, pulling you close and mashing your breasts together, at the same time your felt her stiffness pressing against your folds while Amber kissed and fondled you from the back.
"Give it to her," Lauren whispered, "she's the only one of us that's never felt it."
Amber took hold of your hips and started to slowly slide her erection into you. You thought she was going slow at first because she wasn't used to things, but instead when she was almost a quarter way in she slammed the rest of her erection into you suddenly. You felt your eyes go wide as your back arched and a long low moan came out of you.
Soon you were very acquainted with those delicious mermaid orgasms as Amber used all of the skill she'd gained from you. The whole time Lauren broke out in sporadic giggles. "I can't believe how good it feels to watch her on the receiving end of this..."
However Amber wasn't in any place to respond at the moment. She was nearing her own orgasm by the look of her. With one final thrust she locked lips with you and plunged into you as deep as she could go, as she did you could feel her hot seed shoot into you.
Ambers eyes fluttered and she pulled out of you with a smile. "It feels so different. So good..." She blinked a few times and then looked at you with a smile. "What now?"