You clumsily flop around in the water, trying to get used to your new tail. It doesn't
work all too well, so you slide back up onto the river bank to wait.
Several hours later, and you sister still hasn't come yet. You begin to worry about
whether she recieved your text message. For what seems like the trillionth time, your
fingers drift towards your crotch, but this time, you don't have the self control to stop
yourself. It felt so good the last time, and you're getting used to being a female. Your
fingers explore your new pussy, one finger at a time, until you finally shove all of them
in their, and thrust them in and out. You had always done this to past girlfriends, and
you now understand why they enjoyed it. You moan with pleasure, moving your hands
fast and faster. Your breasts bounce up and down and your nipples harden with
excitement. You stretch your pussy as wide as it'll go and put both hands in it and find
thst it pleasures you even more. You start to orgasm, slowly at first, then as time goes
on fluid pours out of you like water out of a faucet. You moan louder and louder,
almost unable to handle the pleasure you're giving yourself. Faster and faster your
hands thrust, until you burst with one final orgasm, and collapse, exhauseted on the
river bank. You are covered with the juices that poured out of your pussy and your
pussy is sore from all of the masturbation.
During all this, you had been oblivious to the world but while collapsed on the river
bank, you spot a male mermaid watching you, very erect penis in hand, and you can
see his sperm in the water surrounding him. You quickly cover your breasts with your
hair, then realize that's not what he was looking at. You blush because you realize he
saw you pleasuring yourself. He stares at you, and you wonder what he's still doing
there. He's horny, you realize, and just then you realize you're horny, too, despite your
masturbation.
The two of you stare at each other for a few moments, and you can tell that he wants
sex, having once been a male yourself. And you're anxious to give it to him, until you
remember that even though you have a female body, your brain is still male. And
you're 100% straight.