hey, I don't know if this is a bug or intentional game design but I thought about mentioning just in case:
!Spoilers!
In the Gadrun route there is a variable called "relationship-gadrun" which is used to select how the mouse feels towards Gadrun and how Gadrun treats you in general. Particullarly there are some checks for "relationship-gadrun" = 3 (which I presume is intended to be the highest possible value) which determine if Gadrun treats the mouse more gentle or not later in the story. However it is possible to get "relationship-gadrun" = 4 which makes the game pick the colder interactions despite having a better relationship.
Replicating from first choice inside the bird cage:
(Any option but "Let me out of here, you fucking bitch") -> (Wait) -> (Resist) -> (Having fun) -> (Help her orgasm)
If this is a bug I think it should be better to do the checks with "<=" and "=>" for minimum and maximum values to avoid this.