yeah, 10 times exactly is what it takes to entirely break, though the modified bra looks a lot worse at larger sizes. You won't have as much control over those finer details in the final. The reason it breaks is because it's trying to cover 110% of the line- which goes past the ends and winds back in on itself.
The game will be focused on breast expansion only, and the friends tab will be more of method of seeing the past foxes you've grown. It's not like they just disappear when you move on to groping the next one, after all.
Yuri My Beloved could be modded by a particularly dedicated fan. This game... stands exactly no chance of that, considering how hard it is for me to make it to begin with.