It had been a few months since Lori had been so unlucky as to have her bladder deprived of relief all day, and though she'd had a couple close calls, she hadn't experienced anything like it again. She had held it long enough to be arousing and figured out that if she was desperately full of pee, it would start to get her aroused the longer she was deprived of that relief.
Finally, she had reached graduation, which was tomorrow morning. She was nervous, excited, and not quite sure what to expect other than the freedom of college. Maybe it was the excitement and nerves, but it occurred to Lori that evening that she hadn't pooped in a couple days, and she was usually a once per day or maybe every other day pooper. She hoped she could relieve her bowels before graduation tomorrow, but nothing seemed to be moving tonight. She'd have to try in the morning. Her graduation was at 11, with a graduation party right after that which would probably last all afternoon. She couldn't worry about her bowels now though, so she set her dress out for the morning, brushed her teeth and peed one last time before going to bed.
The morning of graduation, Lori woke up because her bladder was literally about to burst, so she jumped out of bed and speed waddled to the bathroom, thumping her ass on the toilet seat and exploding for well over a minute. With a sigh of relief and a mild pee shudder, she finally wiped and got into the shower, forgetting for the moment that she was going to try to poop. After showering she got dressed in some loose fitting clothes to relax and prep her hair and makeup for graduation. Her parents had arranged everything for the graduation party, so she wouldn't need to worry about any of that. She had breakfast after doing her hair and makeup, and the breakfast made her immediately remember that she was going to try to poop. She finished her breakfast then and walked to her bathroom to try to poop. She pulled down her pants and panties, sat for a moment getting comfortable, then tried to push to get her poop moving. Unfortunately, after more than ten minutes pushing, Lori could only get out a few long farts. Her asshole opened twice, but nothing was coming out. Maybe it just wasn't coming out today. She hated the idea of being constipated during graduation, but it didn't seem like she had much choice.
She realized a few minutes later she was nearly out of time before she had to leave for rehearsal. Her dad was running around the house making sure things were packed, which meant they'd be leaving very soon. Of course, right as Lori was starting to get her dress over her shoulders, the need to poop hit her like a bag of bricks. She needed to poop, and it needed to happen soon. She was about to walk into her bathroom when her dad intercepted her and said, "Lori, we need to get going. Got everything you need?"
"I was just about to..." she started to say right before her dad cut her off.
"Just get what you need and meet us in the car, we need to go!"
He was panicked because he was never late anywhere. Lori simply thought as she squeezed her ass around her imminent and much needed bowel movement, "Yeah, I definitely need to go, he's not wrong." She'd have to wait though, because he'd start honking the horn and pissing off the neighbors any minute. The problem was she wasn't quite sure she could wait. Lori commanded herself to be calm, that she was an adult, about to graduate high school, and she could find a bathroom at rehearsal. She threw on her shoes and grabbed a bottle of water to throw in her purse, then walked to the car.
The drive was short, and they arrived a few minutes ahead of schedule, and her dad was finally relaxed. Lori was not though. She was nervous she'd mess up in some small way during the rehearsal or graduation itself, and now she had to poop quite badly, which certainly wasn't helping her nerves. At one point right after arriving, she glanced at her mom and realized she must be in a similar situation, as often happened when her dad panicked and rushed them out the door. She couldn't tell whether her mom needed to pee or poop, or both, but she was tense enough that she clearly needed to do something. Lori just hoped she and her mom could find relief soon.
To that end, Lori realized she had a few minutes before rehearsal, so she walked toward the closest building with bathrooms. She really needed to get this bowel movement out before rehearsal, or she'd be pretty miserable. As she walked into the building, she realized she'd missed a detail. Families of all her classmates were here, and there was a long line. She wouldn't have time to poop before rehearsal. Just her luck really. Just then she remembered a few months ago when she'd been deprived relief of her bursting bladder all day and sincerely hoped that wasn't how today was shaping up. She brushed that thought aside and walked to the next building hoping for some luck but found a similar line. She swore silently at her bad luck, then walked back toward the outside assembly area for rehearsal still holding in a pretty urgent poop. This was not shaping up to be a very good day. She just needed to wait until rehearsal ended and she could zip to another bathroom farther away to rid herself of the urgent load in her bowels.
Rehearsal started, and Lori slowly sipped her water as they walked through the plan, the order of everything, the speeches, the process for receiving diplomas, and the ceremonial throwing of caps, and how not to hit someone accidentally with a cap. Why that even needed to be said, Lori wasn't sure, but it probably had to do with some dumb boy who did it once because he thought it was funny. The whole thing lasted over an hour and was approaching an hour and a half as Lori's poop started poking out of her ass again, and she had to clench tightly to keep it in her round behind. It was becoming tough to keep this monster in her bowels, and she knew she'd have to walk to a farther building to find a bathroom that wasn't crowded. Hopefully she had enough time to get in, have a nice satisfying poop, then get to her graduation on time.
Finally, the rehearsal ended, and Lori checked her watch. Just about fifteen minutes before they'd start lining up to hit the stage for the ceremony, she'd have to walk quickly if she wanted to have time to poop. She started making her way to the arts building, far away enough it might not be busy. Her poop was sitting uncomfortably in her rectum, making her pace a little slower than usual. She finally walked in, found the bathroom and walked up to the door and pushed. The door didn't move, it must have been locked up. She had to go to another closer building, hoping there wasn't a line. She quickly walked to the next nearest building, and walked around the corner to find a line longer than before, and at the back of it was her mom, doing a mild potty dance. Lori said, "I never expected such big lines, and I have to poop. I might not get that chance at this rate."
Her mom, Nora, said, "I've had to go both ways since I woke up, but with party prep I never got a chance. I probably won't get to go either the way these lines are moving. I hate when your dad rushes us. I really need to go badly."
Lori responded sympathetically, "Helps to know I'm not alone. I may try the gym when this is all done, as long as I don't shit myself before then."