Oh yes. You NEED this guy.
But the transformation can wait.
In one swift movement, you bury his face into your cleavage.
"There, there" you coo, "we must do something together first. Perhaps.....a trial of manliness?"
You can feel the boy breathing on your delicate breasts. For a very long moment, nothing happens.
Then his mouth begins to feel your nipples, and sensation rips through you. You moan, and arch back while placing your left hand behind his head. You cannot wait any more, and the right hand searches out, and feels his cock.
The man hesitates, and you lean over to whisper to him.
"I want you."
Then with all your force, you push him into the water, with yourself on top of him. The water is not too deep, and there is only sand at the bottom.
You don't notice a single part of it, because the instant you and your new toy hit the water, you plant your lips firmly on his, giving him the gift to breathe underwater, followed up by positioning, firmly entering him into yourself, and using your powerful new hips to pump him for all he's worth. Ecstasy explodes all over, as you enter pure heaven, listening your moans, screams, and the thumping of your tail on the sandy bottom. And yet you want more, more, more!
Your new toy seems to understand this as he begins to fight back the only way he can, pumping in rhythem with you, and your pleasure increases tenfold. You cannot stop, you MUST not stop, or you would die.
Seconds turn into minutes. Finally, as you begin to tire, the man grabs you, and SPINS you on his cock, continually!
You can only last about ten seconds before your body begins to shut down. If it continues any more, you'll die. You would be happy, but still....only one chance in life. You grab at his shoulders, and stop your rotation, and kiss him for all you are worth, wrestling with his very much active tongue, much like your own.
"You....are mine....and I....am...yours..." you moan into his ear, getting a moan in response. As a finish, you wrap your tail around his left leg, have him re-enter you, and the new sensation makes you faint in ecstasy.
When you reawaken, it is nearly nightfall, and you feel VERY good and horny, especially in the tail. Then you realize that your mate has fainted underneath you, still breathing in water, and from the feel of things, still pumping lots of good blood to his penis.
You giggle, then notice how long your hair has grown, almost to the end of your tail. Then with a start, you notice that it is growing darker, and darker in color, progressing to black, that your skin has grown tanned, you seem to have grown a cup in breast size, and they have become almost painfully hard. And your urgings have not ended.....
With some reluctance, you disengage your vagina from his penis, feeling a surprise rush of pleasure as you do, and once again bury his head in your cleavage.
"They need a massage, love. A good one" you speak, and for your efforts, once again your nipples are caressed by a passionate mouth, filling you with fire, and coming out of your mouth in moans. But then you also remember that talk about change, and that you need someone very permanent to fill you....in.