preface:
Zelda heared that Tamina found a new friend. And as responsible  sister she decidet to visit the new girl and looks what she is like. And after she figure out that Harleking know the girl, she persuade him to introduce her to the froggy. Shortly afterwards both entered a huge Airship and the catlike creature guided her to a long corridor under deck.

The whole surrounding rumble as the heavy machine starts to get up in the sky. Zelda stagger untill she find stability again. She looks to her frind and obtains a smile from him. "Don't worry as soon we will be up  there the fly will be smooth again. Come on, I will bring ya to Rena's Room. She should be in the engine-room like always." He leads her to a room on the side of the corridor who is locked with a massive irondoor. There was the heavy sound of gears and tubes coming throu the wall. He pulled down the handle but the door keeps close. He knocks but there was still no reaktion. Finaly he goes to a speaking tube next to the door. "Rena we got visitors." Nothing happend and Zelda looked curious if the girl perhaps isn't in the room. Harleking saw her expression and repeatet to the tube. "maybe I should define it more precisely. Ya have guests. So if ya could break away from yer machines and open the door?" First it seems the nothing happend again but then there comes a sound from the other sinde of the door like metal grinding on other metal. "Well, that's settled!" Harleking says. "If ya looking for me, some place for the night or just want back on earth, ya will find me in my cabine." He pointet on a door at the end of the corridor. "Unless ya want to fly back with this cute, tenuous wings ya have." He gently stroke her wings with his paw, giving her a pleasant shiver. "Now have fun ya two. And let the machines intact when ya let off steam. 'kajijijiji." He laught and give her a pat on her butt before he betake to his room.
Slowly Zelda opens the heavy door. A overwhelming  heat flows out of the room and engulf  her. The air was heavy  and sweltry and the roaring  sound of the engine becomes pervasive. She enters the room and saw the froggirl hanging in one of the machines, trying to repair them or something like that. But the most uncommon thing was, that she seems to do it complete naked. "Hello." Zelda says, unsure how to react to this situation. "Hi." Was the curt answer she got. "Hey, I'm Zelda. I decidet to visit you." "I'm Rena. Make oneself comfortable." The froggirl realy seems to be busy. Zelda looks around. There wasn't much to see. Just the gears, tubes and a workbench over at the wall. Slowly the heat becomes unbearable . She starts to sweat and it seems that her host don't purposes  to stop her work soon. "Did you mind if I take off my clothes too? It's realy fuggy here." but she get's no respond. Slowly she pulls of her clothes and merge them next to the workbench. Then she turns to the working froggirl again. "So um.. You are a friend of Tamina?" "Jepp!" she got as answer, before the silence suffused  the room again. It can't go on like this. Went through Zelda's mind. Somehow she had to get the attention of the girl or her whole visit was for  nothing. Slowly she sneacks to the working girl and grap her butt with her hands. Then she gives the froggy a surpricing lick.  "Eeep!" Rena startles and drop her wrench. Zelda smiles  and respond. "Did you now notice I'm here?" Rena blushes and looking away bashfully before she slowly goes to her workbench. "Sorry I was a little distracted." She start to tinker on something on her workbank and waggles with her butt in Zeldas direction. "If you don't mind.. well.. you can continue with that what you starded. I don't mind. I just have to finisch this lil' toy here. Then I have time for you." Zelda hesitate. Was this a invitation? She smiles and get over to the workbench too. Slowly she kneels down and start to lick over the exposed slit, the froggirl present to her. A cute and lusty moarn comes from up the place and mingled with the sound of  screwing and welding. Zelda slowly enters her interior. She knows all of the weak spots of a woman and she knows how to tease them to bring the most plessure. It don't take her long to send the froggirl over the edge. With a heavy moars Rena covers all of Zeldas face with a great amount of girlscum. Overrealmed by plessure the froggy falls from her chain and rolls over the floor with the changeling. Thereby the objekt Rena was tinkering falls down the bench and lands near to Zeldas face. Curious she looks at the odd objekt. It looks kinda like a sextoy, but build out of metal, but definitly shaped like the equipment of a snake or a lizzard. "Oh someone beeing a naughty girl?" she confronted the frog with her discovery. Rena blushes with a playful indignation. But it doesn't help. With a powerful dash Zelda overpowers the stunned frog and lays herself in top of Rena.  "And for such a naughty girl I know the exact right punnishment!" she whispers in her ear. Rena gasp as she feels the tip of two lizzard cocks poking against her both holes. "You don't have to.." she mumbles but pushes herself down on it the same time. Zelda likes the vigorous ambitions the young froggirl evince. With a  smile she slowly shoves both erected shafts in the waiting frogholes. A cute moan mixet from plessure of lust and love flows from her new friedns mouth and dined the changeling with a lot of yummy love. Zelda feels that it wount take long to send Rena over the edge an other time as the young frog attempt to reach the mechanic sextoy that lays not far of them. Not aware whats coming up Zelda don't reacts to her efforts and only when the hard metal goes down her tailhole she notice the froggirls plan. First it was odd throu the blank metal feels differens from the normal synthetic material, but the working gears in it gave him an unique pulsing feeling. But it wasn't over. As Zelda start to doupple her efforts on the young froggirl, Rena activated the toy and an integrated piston starts to work the toy in and out of his own. This sudden plessure was to much Zelda could handle in this short amound of time. Aroused she goes to a last shove and both hugged each other as thes reaches her climax together and Zelda pump all of her hot spunk deep in Renas body. 
Panting Zelda disentangle herself from the grip of the exhausted froggirl. "It seems that Tamina had found a realy nice friend." she says as she slowly pulls on her clothes again. At the same time she takes out the new buildes toy. "Did you mind if I keep this?" She ask with a smile. Rena looks up in glee and nods. "No problem. I can build me an other one anytime. Maybe one with two ends." she says with a slightly moarn. "But only at on one condition." she spread her legs and reveals her leeking holes. "Come back soon so I can build it accurate." Zelda stops and smiles at the door. Then she turn around and lays her jacked back to the ground. "Oh I guess I can give you some realy nice submittals right now too."