I feel like it'd be very difficult to make her return plausible, in the sense given her escape about the only role she has left in case of return is to be tortured until she gives away who facilitated her escape in the first place. Neither Jezera nor Andras strike me as someone who'd allow her to just prance around, without making double sure she's been permanently mind broken this time into becoming an orc cock sleeve, at the very least. It wouldn't matter how much Rowan is going to whine about it.
It depends on the narrative... The Twins enjoy making Rowan suffer by taking choices to show the most simple loyalty, they can force Rowan to choose her punishment or she will be permakilled... So... As an element for the narrative, I don't think Act II and much less for Act III to be as open minded or sandbox as Act I, as there are choices and paths taken which history will be move forward, as Rowan could be testify on Rastedel's Fall, he wouldn't waste time and resources and hope in trying to make The Twins a change of heart. He will take the chance if he have it, he'll save her for his own good if in Act I choose to freed her, but the only thing would be how terrible the choices for punishment for her would be choose by Rowan.
It depends on the narrative, and from SoC Team decisions of course...

I don't have high expectancy, it would be a surprise if they come from more than just that for Act II...