She checked her watch, she had only been on the bus for 5 minutes. She had 20 left before she'd be home.
She could feel them getting heavier already, she had badly misjudged it this time. The bus was late. Her day had gone normally up until now, work from 9am to 5pm, Gym from 5pm to 6:30pm, with her supplements being taken on time as soon as she was ready to head home. In the months past, the bus home had never been late. She was kicking herself, but she had fallen into routine and ignored the risks...

Her phone rang, she answered immediately. "Hey, look, I'm going to be home late today...". Passengers around her could notice the worry in her voice. "I could get off, but I'll just be in the same situation further from home... You'll meet me at the bus stop?" There was a short pause, "I'm just going to have to hope aren't I... bye."

As she sat midway down the bus, with two seats to herself she tried to relax her mind. Staring out of the window, at the rain falling against the glass. It was difficult though, with every bump on the road and sharp turn she could feel her medication starting to really take hold. Her bust was already considered large, and for the meantime well contained under both a sports bra and gym top - both skin tight. But this wasn't enough for her. In her line of work, it was very easy to synthesize compounds under the radar if you knew how. 'Risks Outweigh Benefits', was stamped over the formula that she had deciphered all those years ago. She thought the opposite.

After a particularly large bump in the road, her clothes failed to keep her breasts motionless. She felt the jolt, the movement reminded her of what's to come. Failing to remove that from her mind she took her gaze off the window and looked down at her chest. She could see her nipples were starting to show, tiny at the moment, but there just poking through the gym top. In that moment, while regret was still a possibility, she thought back to the early days, weeks, even months. Where bras were optional, where she could go about her day without any need for support, or any attention from horny guys, or women. At that point, she was just worried about being fired, the medication only added a few cup sizes each time she took those pills. Over time though, as she took them she started to notice permanent growth. Slow at first, but there.

As time went by, things she took for granted became difficult. Running on the treadmill was the first thing she noticed, people were starting to stare. Had it been just glances or even just the stares she may have enjoyed it, but every so often someone would approached her in an unsettling way. So she had to start looking into sports bras designed for bigger breasts. With one problem solved, another appeared. Over time the same things happened at work. During the summer heat, wearing her old clothes with her smaller breasts would have gotten her no extra attention. As time went on, she was attracting the attention of HR. 'Colleagues are noticing' was the line she remembered. She knew it wasn't the men that were complaining. Most of the women in the office were jealous now, rumors of surgery were floating around, conversations would stop when she entered the room, and she was unofficially never able to have a conversation with a man alone in case she would use her 'unfair advantages'.

The biggest change though came at home. She lived alone for the longest time, only recently forming a relationship with someone. When at home, she liked to live naked. It wasn't sexual, most of the time, she just enjoyed the fresh air on her skin. What changed, or what she became addicted to were the subtle bits of contact with her home. Where she used to have nothing, now she had a lot. The sensation as her nipple brushed on the shower door on her way out, dripping wet. The bump of the fridge door on her breast as she approaches it a bit too soon. The cold counter pressing her breasts into her chest as she leans over to grab something. Those are the moments she loves to think about. This is what she was starting to think about now, so quickly moved from early days to right now, and what she would be doing when she got home. If you were looking at her from the angle I was, you could tell.

She opened her eyes, after having daydreamed against the window for too long, and checked on the state of her chest. The straps of her bra and top were starting to lift from her skin, her breasts grown enough to stretch her clothes outward. She could feel the regret wash over her, knowing that it could very quickly turn into a very different emotion. The medication had the intended effects, temporary 'hyper' breast expansion, with permanent 'minor' breast expansion. They also came with an unintended side effect that only got stronger over the past few months. Her relationship at home, was very sexual. Who would turn down her offer? She takes tablets, temporarily turns her breasts into examples of extreme macromastia and turns her into an insatiable woman. So far, they have never had to worry. She has always been home as soon as the effects started. This time though, she wasn't, which was certainly cause for worry.

She sent a text, "It's happening. I need you to be at the bus stop, I need you to be there when I get there." That's all it said. I could hear her breathing now. I could see her press her thighs together, biting her lip as she did. She paused to look around the bus. It was busier now than when she got on. No one seemed to be paying her any attention, or at least they weren't making it obvious. Without hesitation, she could feel her own hand slip into her leggings, and further down. She propped her foot closest to the rest of the bus onto the seat to try and hide what she was doing. The smallest circular motions, pressing lightly, then harder, then lighter again. She needed this, she couldn't stop herself. The first pulse raced through her body, as it did her bra became far too tight. She opened her eyes to see her breasts now starting to expand quickly, had overflown both above and below her sports bra. She tried to push through the pain, closing her eyes and focusing on her finger running circles around herself when the second pulse crashed through her body, sending her inner muscles into spasm. She let out an audible moan, and knew what she would see if she opened her eyes.

He bra now sat on top of her breasts, their sheer weight had pushed past the bra aside as if it were nothing. Only an hour ago it had done well to contain her breasts during a sprint on the treadmill. She had to take it off. She had to. In an instant, she had managed to take it off without removing her top. Whilst she felt relief, she looked no less sexual. Where her breasts were pushing past the bra, desperate to be released they were now resting under her gym top with room to grow. Not only that, but she was starting to attract attention from more than just myself. People whispering to each other, "Can you believe it?", "If I did that on a bus, they'd arrest me", and finally, "i wish my phone wasn't dead...". They weren't shocked at her growing breasts, they hadn't paid enough attention to notice she got on this bus looking like a 30DD, now with breasts wider than her torso.

As the minutes until the bus stop slowly ticked away, that changed. Where she had initially been looking at her watch every few minutes, she had now simply forgot about it. The last she saw, she had 10 minutes left until the bus stop, and then home. She was now so focused on keeping the pleasure building. She could feel herself getting closer. It was happening. Her toes were starting to curl, muscles starting to contract, breathing becoming rapid. There was no use in trying to hide any more. With her free hand she grasped her breast. They felt full, and firm, they bulged out in the gaps between her fingers and barely moved as she massaged them. As she ran her fingers over the top, over her nipples she let out a muffled scream. It lasted only 10 seconds, but felt like an eternity to her, and an instant to me.

As she sat there, panting, unaware during that surge of pleasure that her breasts had grown considerably, stretching it so much that as soon as it was only able to retreat upwards revealing the breasts to the open air. Her nipples now larger than the fingers caressing them, areola so pink, so large that even my hands couldn't contain them. With her breasts now resting on her legs, and pleasure satisfied for a few moments, she was able to hear. 'Next Stop: Station Road'. As soon as those words registered, she bolted for the bus door. Or tried to. She struggled to get up from her seat, every time she tried to stand up her breasts were pressed against the seat in front of her and pushed her back down. As she shuffled across, her hyper-sensitive post-orgasm nipples brushing against her leggings as she did, causing her to fumble even more. Once she was free from the confines of the seat she was able to stand up.

She either didn't know I was there, or didn't care. She probably wasn't used to being in such confined spaces in her current state, her spacial awareness probably hadn't caught up yet. As she stood up and raced passed, her breasts collided with me as she turned. I am able to hold my own usually, but it felt like I had been hit by a bag of cement. I flew back into a seat that was not empty and watched as she raced out of the bus. Her breasts colliding with people, chest to chest if they were standing, or burying heads and faces if they were sat. I saw her run to someone as she left the bus. I couldn't tell through the rain if they immediately left, or she knocked him to the floor to try for round two.

As I composed myself, along with everyone else on the bus, I was able to finally take a seat. I shuffled along to the seat by the window. At first I thought someone had left the window open and the rain had gotten through, but then only after my hand was soaked and I had sat down that I realized why the seat was wet. There was something strange going on, because later that night things happened to my body I never thought possible, and I've never been the same since.
