Before it used to be 2 months and now it takes about 2 months for Rendering and Animation and about 3 weeks for Coding, Sound, Dialog, Translation etc.
Well only the last update 0.11 was released after 3 months and all the ones before this were released in 2 months and now this one, 0.12 will also be released after 3 months so I don’t know you can call it a 3 month game if you want but even that is a lot faster than other developers making adult games while some releasing update only once in 1 to 1.5 year.
LM usually released updates within the 60 - 70 day range, but as the game/story go on, the branching becomes more demanding to manage; it's natural that the dev time increased as a consequence.