If you're in a monogamous relationship with a companion, in this case Shadowheart, it's just weird that the writers decide to make her disappointed when denied the option to sleep with someone else. That's just wrong. There are certainly instances where such a reaction might be valid and for some players it might fit, but that should sort of still be the players choice.
is it that weird really? You engage your partner in a sex fantasy involving some drow that make you excited. Then when it is suggested that she can have some fantasy fullfilled as well, you deny her. That's a bit selfish. It should work both ways, you get your dirty fantasies and she gets hers. Why is your enjoyment the only one that matters when you decide to bring this experimenting into your relationship? I can see why that gets you a disapproval, though she still goes through with denying herself and doing things your way anyway.
At the point where you take this relationship to a pair of sex workers and suggest sexual experimenting with other people, you are not proposing a monogamous relationship any more. Your actions are your responsibility, the rules of monogamy apply the same to you as to everyone else.
