No, they still have to get back at their father

“soon, brother, soon” – Answered carter – “we still have another issue here”.

Arnold sighed. He just wanted to go home, well, to his room and forget everything that had happened in the last two days.

“Tammy, we want to get back at the guy who did that to Arnold. Any suggestion?”. Carter did not want to tell Tammy that the guy was their father.

Tammy thought for a while – “it depends on how mean you want to be”. “I have a serum that can shrink a dick temporarily, so you can give the guy a good scare” – She said.

“That sounds perfect” – Said Carter – “How does it work?”.

“I should not speak much about it as it’s an experimental serum and still illegal but I am already offering it to special customers” – She explained, looking at Carter as she said special customers – “Basically, it has the same effect of a cold shower. It shrivels the dick to its minimum so it will always look like if you just got out of a very cold pool”.

“Sounds exactly what we need. But what about erect size?” – Asked Carter.

“It decreases the flow of blood in the area so the erection will be much smaller than usual and less hard but, then, it depends on the guy. I will show you” – She said – “Tim, come here” – she called the other guy in the shop.

A guy in his late 20s appeared from the other side of the shop. He was quite cute, but his hair looked greasy and messy and he had a grumpy expression on his face. He was a little chubby as well.

“What do you want, Tammy” – Tim asked, brusquely.

“These gentlemen here want to see the effects of the new serum” – Rammy informed.

Tim smiled – “Of course, that serum is incredible” – He said, as he took his trousers and boxers off. His package was in full sight. His dick was very average, about 3.5” soft and his balls also looked pretty average.

Tim took the serum and put a drop in a glass of water and drank it. In a question of seconds both his dick and scrotum contracted suddenly. His dick was now about 2” inches but his balls were almost hidden – “see” – said Tim getting close to Arnold and Carter – “It’s like if I had been in freezing water. This is as small as it gets” – he said pointing at his dick.

“Impressive, man” – Said Carter – “and what about erect?” – he asked.

Tim started stroking his dick, but it was barely growing or getting hard. After a while, it got kind of semi erect. It was about 3,5” maximum – “This is as big as it gets with the serum. I measured it at 3.6”. My usual length is 5.7” – He explained.

“Wow” – said Carter – “so the serum makes your dick shrink about 2 inches”.

“Yes” – said Tammy – “but it also depends on the guy. A guy who is usually affected with shrinkage will be more affected by the serum. I am sure the serum will have little effect on your little grother here” - she said, winking at Arnold.

“and how long it lasts?” – asked Arnold, trying to change the topic.

“One drop lasts about one day but we really don’t know for sure. The maximum I had was three drops and it lasted almost two months. My brother had two drops once and it just lasted a week” – Explained Tim -"So, we don't know the exact effect yet".

“If you just want to get back to a guy, I will recommend just to use one drop” – Said Tammy – “that will scare him enough”.

Arnold nodded but Carter just grinned.

The brothers took the serum and went home. It was almost dinner time.