lore-wise: is the Dark Brotherhood able to refuse a contract to kill someone? Like, what if killing a particular person is not in the Dark Brotherhood's best interest, or is a member of the thieves guild or some other http://www.gamesas.com/topic/1523694-can-the-dark-brotherhood-refuse-contracts/# or ally?
Assuming the black sacrament was performed
If so, does the http://www.gamesas.com/topic/1523694-can-the-dark-brotherhood-refuse-contracts/# supplied need to be sufficient for the night mother or Sithis?
If I had to guess, I would say yes, but only if another life was taken for Sithis to replace the victim who otherwise would have been http://www.gamesas.com/topic/1523694-can-the-dark-brotherhood-refuse-contracts/#.
P.S. If this thread is unnecessary, could someone please direct me to a dark brotherhood http://www.gamesas.com/topic/1523694-can-the-dark-brotherhood-refuse-contracts/# thread? thank you.