Wait.

If the fundamental reason why Carissa prefers Keltham is that Keltham will never statue her, and then Abrogail kidnaps Carissa for purposes of slow yet ultimately fake petrification, and afterward swears never to do that to her (barring deliberate betrayal etc) -

...could Sevar actually start falling in love with the Queen and start to lose attraction for Keltham.  Is that actually a thing they need to worry about here.

Wait.

If the fundamental reason why Carissa prefers Keltham is that Keltham will never statue her, and then Abrogail kidnaps Carissa for purposes of slow yet ultimately fake petrification, and afterward swears never to do that to her (barring deliberate betrayal etc) -

...could Sevar actually start falling in love with the Queen and start to lose attraction for Keltham.  And then Abrogail ends up losing her throne or pregnant with his child.  Is that actually a thing they need to worry about here.

Wait.

If the fundamental reason why Carissa prefers Keltham is that Keltham will never statue her, and then Abrogail kidnaps Carissa for purposes of slow yet ultimately fake petrification, and afterward swears never to do that to her (barring deliberate betrayal etc) -

...could Sevar actually start falling in love with the Queen and start to lose attraction for Keltham.  Is that actually a thing they need to worry about here.

...is the part where Abrogail then ends up losing her throne or pregnant with Keltham's child also something she needs to worry about in that case.