It works

You sit there, mind running through all the possibilities of what could happen in 15 minutes, an erection slowly building in your pants. So, you adjust the complimentary blanket so that it is not as noticeable.

You keep checking your phone and looking behind you, down the aisles, to see if the air hostess was coming back. Then, you see her walk through the dividing curtain between the sections of the plane. You take a breath, unbuckle your seatbelt, stand up, and walk over to the toilet. You open the door and look back at her, she smiles at you, then you walk inside and close the door, leaving it unlocked.

The door opened and the air hostess walked inside, locking the door behind her. She grabs you and starts passionately kissing you. You start to strip her uniform and she does the same to you.

You grab one of her ample tits with one hand and started rubbing and pinching her nipple. She gently rubs your cock and then slides it between the lips of her pussy, letting out a moan as she does. She starts thrusting and gyrating her hips, as she moans louder and louder.

You pick her up and brace her against the wall, grabbing both of her tits and playing with the nipples to give her extra pleasure, as you thrust your engorged organ inside of her, causing her to moan with each thrust.

She cranes her neck back and lets out a long moan as she comes. She then wraps her legs around your back and passionately kisses you again.

"More!" She moaned into your ear. You pick up the pace, thrusting your cock in as hard and fast into her as you can. She feels amazing around your cock and you can feel yourself building closer and closer to coming. She comes again with the extra push from you, her body shaking with pleasure, "More!"

You give her everything you have left, the pleasure building more and more with every thrust. She comes again, the biggest orgasm yet, her body shuddering and her pussy contracting, giving you the extra push to come at the same time. Your cum exploding out of your cock, inside her pussy. The cum heading to impregnate her just as your rule stated.

You relax and place her back onto the ground before sitting on the toilet to relax.

"Thank you, that felt amazing!" She says, picking up her clothes and putting them back on.

"Yeah, it did." You reply, filled with bliss. Then you remember your impregnation rules, and given she's not currently begging at your feet it must take some time for her to be classified as pregnant you assume, "Hey, do you have any paper and a pen. Or pencil?"

"Yeah." She says rifling through her suit jacket pockets, she pulls out a thin notepad and pen, "Here."

You take it and write your number on it, giving it back to her.

"Take this." You say handing it back to her, "In case you ever need it."

She takes it and finishes getting dressed, she goes over to the door and unlocks it. She gives you a wink, and then leaves. You lock the door, get dressed, and decide you might as well use the toilet while your here. Then, you head back and take your seat, happy that your rules have worked.