The humid air hung thick, smelling of saltwater and anticipation. You watched as Cali, your beautiful, anthromorphic octopus bride, descended into the specially-constructed, massive tank. Her iridescent skin shimmered under the filtered light, the bioluminescent patterns on her tentacles pulsing a soft, inviting blue.

This was "The Filling," the first and most significant ritual of a Zxy wedding. Cali, eager to please, gave you a playful wink before disappearing beneath the surface. As she began to drink, the water level in the tank seemed to barely budge. But you knew better.

Zxy were renowned for their incredible elasticity. They could stretch and expand in ways that defied human comprehension. And Cali, more than any other Zxy you'd ever met, seemed determined to push those limits. She wanted to be big, and she wanted to be big for you.

Minutes stretched into what felt like an eternity. The crowd, a mix of humans and Zxy, murmured with hushed excitement. You watched, captivated, as Cali's form beneath the water started to grow noticeably rounder. Her already voluptuous figure was becoming… immense.

Then, she broke the surface, gasping playfully. Her normally sleek torso had ballooned into a magnificent sphere, her tentacles now struggling to reach around the vast circumference of her belly. It was a sight that made your heart pound in your chest.

"More," you whispered, the word barely audible amidst the gentle lapping of water.

Cali, her eyes sparkling with affection, nodded. She submerged again, and the transformation continued. Her size became truly absurd, a testament to her love and her race's outlandish physiology. The tank, you suddenly realized, was starting to look small.

Panic flickered in your chest. You hadn't considered the possibility… but the water wasn’t rising much, was it? And Cali… she kept on drinking.

Just as you were about to signal her to stop, she surfaced again, practically overflowing the tank. Her belly was a colossal, shimmering globe, straining her wedding garments to their limit. And yet, she wore a radiant smile.

"Done?" she bubbled, her voice a little strained but full of love.

You stared, speechless. It was then that an elder of the Zxy stepped forward, a knowing glint in their multifaceted eyes.

"Young one," they said kindly, their voice a melodic hum, "have you not learned? The Zxy are creatures of infinite capacity. Our love knows no bounds, and neither do our bellies."

Cali giggled, a sound like underwater bells. Her belly jiggled, a truly impressive sight. She was, undeniably, the biggest and most beautiful bride you could have ever imagined. You realized then how special Cali was.

The elder nodded towards you. "It is time for the Conclusion."