Please read up about consent. It's pretty clear that the initial Karryn is NOT ok with the prisoner's activity. I am worried about your interpretation and the real-life consequences.
I am fully aware this game is a fantasy, but I'm not sure you are.
Maybe that's just my interpretation of it, but I think the game's mechanic at least try to make it clear that Karryn is repressed pervert when coming to the prison and any sex that does happen is out of her own choice.
Like, when she loses her virginity she doesn't go 'AHH STOP IT' but something along the lines of 'why did I just give my virginity away to some random guy...?'. Note how she says that she gave it away, not that someone took it from her.
Hell, even when she's groped it seems implied that she lets this happen on purpose.
For example, when a prisoner gropes her, no matter what she says, we see her desire going up. Furthermore, she says things like 'I didn't say you could go that far!' etc, implying something along the lines of a prisoner asking 'come one, just let me give them a quick squeeze' and Karryn agreeing to it.
Even when down on the floor, with her weapon kicked away, the prisoners will do nothing but look at her if Karryn doesn't have the required desire. Obviously it must be fully in her control of what she lets happen.
Like, yea the prisoners actions are obviously out of line and everything done would definitely fall under 'sexual harrassement' but the statement 'there is no rape' holds true imo.