*Cassia's about to Explode*

Cassia's heart hammered against her ribs, though she kept her expression carefully neutral.

Rooming with Mira was unbearable.

Every moment her pink-haired roommate jerked off, made a lewd comment, or stretched languidly on her bed wearing little to no clothing. Cassia's body responded whether she willed it or not. Her cock had taken to stirring at the most inappropriate moments, swelling against her thigh during lectures, rising fully during meals until she had to press her hands beneath the table and will herself to think about politics, about her mother's speeches in the Senate, about anything other than the constant arousal that she felt.

Cassia made her way along the pool's edge, past clusters of students who lounged with the casual indifference of those who had long abandoned their own modesty. A pair of third-years sat upon the stone edge, their bodies and cocks fully visible, completely at ease as they discussed what sounded like political theory. One of them reached over and gripped her companion's length without ever breaking the thread of her argument. Cassia looked away, heat rising to her cheeks that had nothing to do with the steam.

This was precisely why she needed a private spot.

The far end of the cavern offered more protection, where the steam was thick and the oil lamps were dimmer. Cassia made her way there carefully, stepping over discarded towels and tunics left in careless heaps on the wet stone floor. She passed a pair of students pressed against the wall, one's hand buried between the other's thighs, their soft moans swallowed by the hiss of venting steam. Further still, where the cavern narrowed into a shallow alcove barely visible through the mist, she heard the wet, rhythmic slap of flesh against flesh and saw shapes moving together in the darkness.

Cassia kept walking.

The alcove she finally settled on was little more than a recess in the tiled wall, shallow enough that she could still see the main pool if she turned her head, but set apart enough that the steam gathered here like a curtain. Cassia removed her towel slowly, hanging it on a hook beside the alcove, and felt the warmth of the room against her bare skin.

She stepped down into the water and gasped at its warmth despite herself. The water came to her waist, then her hips, then settled just below her breasts. The minerals made the water silky against her skin, and she closed her brown eyes for a moment, letting the heat work its way through her.

The heat only made her problem worse.

Cassia bit her lip and pressed her thighs together, but the pressure only sent a jolt of sensation through her groin. Her pussy, already sensitive and responsive from the mere thought of what she was about to do, grew even more wanting still, her inner lips swelling beneath the water. She could feel her cock rise, inflating, pressing ever outward.

She needed release. Desperately.

Cassia spread her thighs beneath the water and reached down between them. Her fingers found her cock first. She wrapped her hand around it and stroked once, twice, three times... a moan escaped her lips before she could stop it. The sound seemed to echo in the small alcove, and she froze.

There was no response. Nothing. Just the hiss of steam and the distant murmur of conversation from the main pool.

Feeling emboldened, Cassia’s hand resumed it's mission, moving faster now, stroking her length with an urgent rhythm. Her other hand drifted lower, fingers finding her slick entrance, parting her swollen lips and pressing inside. She gasped and arched her back, her breasts rising, her nipples tight and aching. The steam curled around her like a lover's breath, and she let herself sink into the sensation, her head resting back against the pools stone edge.

My will. My body. My choice.

The mantra had become a weapon against her own desires, a shield she held up whenever her body threatened to betray her aspirations. But here, now, in the heat and the steam and the safety of her private alcove, she set the shield aside. Here, she could be what her body demanded she be. Here, she could want.

Her hips thrusted up into her own grip, and she imagined, unable to help it, hands on her hips, a body pressed against her back, a voice in her ear telling her exactly what to do. The fantasy bloomed unbidden, unwanted, and deeply arousing. She saw her roommate Mira's pink hair and knowing smile, heard the way Mira had said I'm going to make you my first beta like it was a promise rather than a threat.

No. Not Mira. Anyone but Mira.

But her body didn't care about names. Her body only cared about sensation, about the building pressure in her balls, about the way her pussy clenched around her fingers, about the ****, aching need to be filled and to fill in equal measure.

Cassia bit her tongue and stroked faster, her thighs trembling, her breath coming in short, sharp gasps. She was close now, so close, she could feel her orgasm building like a wave gathering height-

"Cassia? Cassia!"

She froze.

The voice came from the main pool, cutting through the steam like a razor. Cassia's eyes flew open in panic, and she yanked her hands from between her thighs, pressing them flat against the stone either side of her in order to keep them still. Her cock, denied its release, jutted out insistently, still fully erect, it's shadow unmistakable beneath the rippling water if one were to look.

"I thought that was you," the voice continued, closer now. "I called out when you came in, but you must not have heard me. You were walking like a futa possessed."

The steam parted, and...