I mean the only solution I can think of is just not having Serana present for those scenes. There's no scenario where she's going to be actively ok with her religion's Christ figures doing slave stuff. So if you give me a heads up I can come up with an excuse to have her moved out of the way.<br/><br/>Edit: Again, I cannot stress enough that this is the equivalent of a catholic finding out that an ordained saint is being held as a sex slave, and that they're expected to just go along with it. It's not something you can really justify the character being ok with.