I don't agree. I think act II could be a more public portrayal of Alexia's corruption; right now it's all hush hush, but Act II could have her almost openly side with the twins. A dramatic event happens in Act II, and then in Act III you can either have redemption, or the complete fall.
And her openly siding with the Twins would matter how? Really the only arc left to Alexia after Andras NTR would be for her to try to manipulate Rowan to Andras' favour. Or I don't know, some straight up humiliation scene in which a Pure Rowan will just off himself and a corrupt Rowan would just kill her.
The Alexia Act 1 NTR arc should have ended with her willingly having sex with Andras with no blackmail or duress. And then her becoming his slut could be developed down the line in Act 2. In the final act when Rowan would get his chance to make a stand against the Twins or attempt to take over from them, a full NTR Alexia would stab him in the back as the culmination of her arc (and a corrupt Rowan would kill her for betraying him)
Also, there should be more chances to redeem her imo.
The problem is, she is already there. She'd betray Rowan just to get a chance to clean up Andras' dick after he fucks one of his whores at this point already.
And don't get me wrong, the scenes are hot and well done. Just they could have been spaced out more.