"Is it okay?" you ask Ava.

"Ah... A-are you really fine with that? Isn't this cheating on you?" If the clerk heard you speak out loud, she gave no signs of it.

It's only cheating if I don't know about it, or if I don't approve. Also, ain't no way you'll ever ditch me for someone better, so have all the fun you want.

Before you can respond, Ava's voice echoes in the whole store. "Alright, honey, my little boytoy over there wanna play with you once more. Wanna ride him?" You hear a loud slap as Stacy yelps loudly, perking back up and throwing her head and body backwards.

"W-w-what?" she stutters.

"You. On him. Bouncing on this." You felt your still fully erect penis wobbling side-to-side by itself, waving at the clerk and catching her attention. "You in?"

"Well... I–"

"Good!" Ava cuts her off. Your balloon backs up a foot to free Stacy before it unceremoniously lands on the floor, making you bounce and wobble a bit. Luckily, the balloon takes care of keeping you properly balanced atop of it, leaving you to relax and prepare for next round. "Get on, cowgirl!" You feel something slapping the balloon under you, right between your legs.

Only now do you notice Stacy is naked from the waist down. Her pants, her underwear, her shoes and her socks have vanished at some point. You can clearly see how wet and ready she is. She doesn't seem to have noticed her predicament. She's just staring at your slouched back form atop your airy latex beanbag. Your penis moves as if beckoning her closer. Hesitantly, she makes the steps to reach you before putting her hands next to your wrists and your waist, resting them on the balloon. Your penis is at the same height as her navel due to the size of your rubber seat.

"Can it take both of our weights combined?" Stacy quietly asks.

"It could take a pile of elephants if I desire. Learn to trust me and get on him, already!"

Stacy is unceremoniously lifted off the ground which forces a panicked scream out of her before her ass lands on your stomach, the balloon only wobbling from the added weight and nothing else. You were thinking to tell Ava to calm down with the poor girl, but held back. Surely she wouldn't be so cruel to hurt the clerk, right?

"I know exactly what you want, honey. Thus, the more you please him, the more you'll get rewarded. Have fun, you two~!"

Stacy hesitantly looks at you, her body lightly shuddering after a few seconds, her face blushing furiously. "And... do you want this?"