When Jay and Dan did enter their shared place, they both only greeted Sean for a second before moving to eventually get settled on the couch as well. Dan even lightly trying to have Sean make some spaces while saying: "Dude, I know you gotta spread your legs, but can you at least make some space? The couch is only so big!" So they did think he's always had this. That was good to know. But how would they react if something about him changed right in front of them?
Should he grow his udder again? No, then he'd probably just have a serious orgasm right in front of them and that would just be too freaking weird. But he did want to see if he could do something that they should notice growing under normal circumstances.
And as he discreetly used the Chronivac again, he actually pulled up the dick options again just to pull and drag the same one he had used for the teats to his chest and replace his nipples with it. But he did make some adjustments to them just so he could ensure that they were noticeable and also wouldn't make anything weird.
To make them more noticeable, he actually ensured they were pretty big. As fat as soda cans actually to ensure they left an obvious bulge. Hell, he even made them veiny to add more to the look.
Then to make it less weird he did write that they were able to get hard and erect, yes, and that it was completely natural for Sean to touch and play with them and not strange at all. Just so in case they did get erect and Sean began to try and jerk them off, Dan and Jay should think it was fine.
And oxne he was done typing everything in, he did hit the button to accept the changes. The changes were noticeable rather quickly as Sean did move one of his hands to press against on of his nipples right away, trying his hardest to stay quiet. They already felt pretty good. And now he could feel them grow bigger and fatter right in his hand and through his shirt. The two bulges were obvious immediately. And yet as they continued to grow, Jay actually looked at Sean and said: "Okay, but seriously, I know my girlfriend has bras that are basically just fabric. You could wear one fo those to not have those things flop around all the time."
Yet as Jay said that, the dicks had only grown larger and definitely erect as Sean continued to stroke and play with them, only barely breathing out a: "Yeah... Totally...."
"Nevermind. There's no way you'll find anything to hold those anyways when you get turned on.", Jay suddenly changed his mind though as the dicks continued to grow. And when they were finally done, Sean was by now just using both of his hands to jerk off what were once his nipples as Jay and Dan just continued to talk as if nothing was wrong at all.
But now Sean did have a problem.. He felt hornier than ever. And, sure, he could at least jerk off the two newest members he judt grew on his chest... but the real issue was what was in his pants. And he really needed that to be dealt with somehow...