Yea but you have to realize that the only reason Alexia is mouthing off to Drokk is because she has Andras backing her up now and is protected by him. So she is still an insecure character, she's hiding behind Andras's strength and that is what gives her the courage to act up. It's just the squabbling of someone weak, Alexia knows that without Andras she wouldn't be acting this way. (Also the reason Andras doesn't just "take" Alexia is obvious, it would ruin their plans to have Rowan join because obviously without Alexia they have nothing on Rowan to keep him in service so Alexia would obviously tell Rowan what Andras did.) Not sure why you think Alexia saying no to Andras would somehow make her not insecure? Those don't have anything to do with each other and are very different from her husband having sex with a woman in their own bed.
I don't get your point of view about Alexia being insecure... In the same scene but the couple being loyal, Alexia relies on Rowan for the same problem, the Orc ask for pardon and she does give it in return iirc. What i mean is, Alexia knows that she can't match against an Orc, she's like any of us writing here without a weapon and without any sort of training nor any skill for self-defense. So, a person that can't match against a threat like in the case of Alexia is an Orc, will just rely in a figure of authority, in our case a police, in the case of Alexia, she relies in an Authority Figure that she confides more, if the couple is loyal then is Rowan, if not then is Andras. She's like any other person, with her virtues and vicious, and with the desire to live with some respect so, knowing her disadvantages inside Bloodmeen, that we could compare barely to live in some dangerous ghetto (in terms of security for "normal persons"), she would rely in the police or in the gangsta that would just put in his sack the boy (if u know what i mean). Do you really expect Alexia confront the Orc directly? she wouldn't stand a chance if the Orc just fight back without words, which tbh is possible.
Now, about raping Rowan's woman, being Andras i wouldn't see the problem, i just tell him if he served us he can commands our armies in a position of power, not kill his wife and have the right to save as much the people he swore to protect... The threat is still open in favor for The Twins against Rowan. Regarding Alexia being insecure by still saying no to Andras to later experiment the betrayal of her husband, because she make it clear, she doesn't believe in Rowan whatever option you take, is scripted but justified, she believe that Rowan had love feelings for her, both (Rowan & Helayna) knew each other, perhaps before Rowan married Alexia and he could never stand a chance because of his position in life as a commoner, the same is for Helayna, in her story she reserved her feelings because of their own position as a noblewoman. So, imagine that the woman you had feelings in your youth is about being brutally rape and her chance to avoid it is if you instead rape her, but still, she in her youth had feelings for you, both never confessed because both in social terms lived in worlds apart, you only could known her because of a work you did for her family, and now in your actual situation you're married, will you stand there to see and hear how she's brutally raped before you?. That's more or less the situation Rowan is... Apart from the options you can take, iirc, the story in a resume of the triangle Rowan, Alexia and Helayna is like that.