The point of the Desire System is, that she then acceptes the sexual advances from the Prisoners. That is why she says for example, why did I give my virginity, why to I let them fuck me again or I didn't say you could touch me that long etc.. If you get raped, you would never use that kind of language. Now, does it make any sence, that the Prisoners would wait for her do give the go sign? No, not at all but that is just the Fantasy, that this game sells. And well it helps to get the game on Steam, since Steam is very touchy about rape stuff.