I think it will gnaw at her if she doesn't.

[ Loki says this with a sort of graceful finality, pouring wine, ever the courtier's manners. But it's probably clear, at least to Astarion, that he is not as comfortable with this idea as his tone would imply. ]

She has never needed anything, anyone before. How could it not chafe? And there is something to be said of me. A divided loyalty. Eventually she'll be driven to test it, to strike out on her own in this world.