Whoopsie!

The night was wild with dreams full of sex, and big tits, and Max fucked everything with a cock too big to be real. When the alarm woke him up the next morning he could still feel his cock raging down there. But when he checked it was back to 8 inches. Still big, still nice to look at, but nothing compared to what he had been when he fell asleep. And those knockers his mom sported just didn't want to go out of his head, especially not the effect they had on him. She really knew how to hit his kinks well.
"Get up! Time for school!" Sherrie yelled from below, like nothing perverted had happened last night. With an annoyed groan Max swung out of his bed, did his best to hide his still semi erect dick with fresh clothes, and wandered into the bathroom before his siblings would block it. 20 minutes, a good shower and a relieving wank later, he went downstairs into the kitchen for breakfast, but when he saw his mom his eyes almost popped out of his skull.

"Hey sweetie." she chirped and gave him a kiss on the forehead. Max was happy that he had decided for the quick wank, as other wise the sight of those literal melons hovering in front of his mom, exactly as they had been the previous night, would have given him an instant boner.
"Mom... what..." he whispered, but she just smirked.
"I figured I can just make the world think I've always been this big... and full." she explained and gave her rack a little shake. The momentum alone told Max how full with milk these balloons were still. "I take that bulge as a yes." she laughed, and once again caused Max to glow bright-red. "Now get your cereals." Then she turned to the stair and yelled for his sister Jill and his brother Kevin to hurry up. A morning as usual, if it wasn't for the huge orbs his mother now sported. He sat down at the table and started to much from his bowl wondering how his siblings would react to it. Also somehow breakfast tasted a lot better today, getting Max to check the box of cereals, but they were still the same. Maybe a new formula.

"Mornin..." Kevin mumbled and yawned. He certainly wasn't a morning person. Max wondered if he was simply too tired to notice the gigantic tits his mom now sported, or if Sherrie actually managed to make the world literally believe this was her normal size. But then Jill entered, hugged her mom, and went to the table like she didn't just sunk deep into the firm cleavage Sherrie now carried. She would have for sure said something, complaining was basically her hobby.
"What'cha staring at?!" she hissed at him, and Max decided to better focus on breakfast and not growing a boner from thinking about what else his mom could do given the power to make the world ignore even ridiculous changes. His dreams this night contained a few great ideas... But before he could really finish that thought the bus arrived, and - as usual - they had to hurry to catch it.

"We should get up earlier." Kevin panted as he sat down next to his brother "Then we wouldn't have to run every time."
"Why don't we?" Max asked amused, knowing the answer already.
"'Cause I don't wanna." Kevin grinned. For a moment it felt like a completely normal morning despite all the shenanigans than happened tonight (and probably will happen again), but then 5 minutes into the ride to school Max noticed the sizable bulge in his brother's pants.
"Dude.. you got a boner?!" he whispered towards him.
"I can't help it..." he said and blushed. But then Max suddenly felt a tingle himself and within seconds his dick turned rock solid as well. Kevin definitely saw that, and it was hard to miss with those 8 inches tenting his pants. They both had to do some adjustment as they tried their best to not draw any attention or to mention it, but that erection didn't want to end. Also despite his best (and sneakiest) efforts, he couldn't get his dick to stay in position. Till Max eventually realized the problem: his cock was not still growing hard, it was growing bigger! And not only on him, but also on his brother. Slowly he felt the head of his dick rising further and further upwards, already past his belly button, and with seemingly no end in sight. And then it hit him...

"Mom?" Max whispered into the phone "That milk this morning.. was that..." he eyes his brother, but before he had to explain further, Sherrie was already giggling.
"Yeah, a little surprise. I hope you enjoyed?" she admitted her little perversion.
"I did... but... did you forget about the other effect?" Max kept whispering, while his cock now reached to his chest. There was a moment of silence on the other side.
"Oh f... damn." Sherrie cursed "I totally forgot, sorry! Are there any... effects?"
"You could say so... my dick already reaches to my chest, same with Kevin. Not sure about Jill though." Max didn't dare to look around as he could barely keep his raging boner hidden. "Mom you better do something!" Good thing Kevin was too distracted by having an approximately 14 inch erection right now to really listen to what he was saying.
"Oh my... I... I..." Sherrie stammered "I am not sure if I can safely undo that at this distance, but I might have an idea. I mean: you said you would love to try that in public, right?"
"Yes, but..." Max suddenly felt like doom creeping up his spine "How can we explain that?!"
"That's the good thing, you don't have to! I just do the same thing I did with my tits, and everyone will just think you've always been like that. Except for us two of course, sweetie." she explained. Somehow Max felt like his dick got even harder at the mere thought of walking around like that.
"Done." Sherrie eventually stated. "Check with your brother. If it works as I think he shouldn't know anything has changed." Max eyes his brother, unsure what to say. He however was sitting there quite relaxed, not even caring about the raging dick tenting his pants and top. Max decided for the most obvious approach.
"Dude... you got a pretty big boner." he stated. Kevin just looked over and rose an eyebrow.
"Yeah?" he asked confused "I always do?" That gave Max an incredible rush of satisfaction and horniness at the same time.

"I think it worked, mom." he whispered back into the phone.
"Then I guess... have fun with it while it lasts!" Sherrie laughed.
"Oh I will mom, I will. Thank you!" Max was grinning like crazy at his literal wet dream coming through. Walking through school with what had to be 16 inches of rock-hard cock right now and no one would even care was something he had been fantasizing about so many times. He'd probably cum several times, but that was definitely worth it.
"Oh, and better don't drink the milk I gave you for lunch then." Sherrie suddenly interrupted his horny haze "And maybe take them off your brother and sister, will you? Just tell them I told you it has gone bad or something."
"Yeah, will do. Thank you mom! Love you!" he finished and hung up after her response. He quickly checked his lunch pack, and realized his mom had been very productive. It was a full bottle of her milk, that would for sure get him to sizes he could no longer hide in his pants anymore. On the other hand...