Well, the cons will want something to their gain from allowing the child-molestation bill to be voted. The church and other lobbies that fund the conservatives expect them to obstruct that bill because it's counter to their interests. So there's incentive to not allow the bill to be voted on, meaning there's leverage against the left where the conservatives can eke out some sort of advantage if the left wants this bill voted on. Tit for tat.

(It's entirely fucked up)