I dunno i find her more annoying than anything. The two of them have no real chemistry to speak of.
Look, shes the princess of a fallen empire. This guy is good looking, a great provider... literally owns his own island
and secret town,
stole bought the remnants of your empire staff, and is your one last ticket at making everyone who destroyed your empire pay.
I'd say that qualifies for a lil' sucky-fucky action, chemistry or not.
Not to mention, now that you managed to get him to accept his title as "King" any baby you manage to get him to shoot inside of you is
royalty inheriting your bloodline.
...Revenge is a dish served cold, but the revenge of avenging the destruction of your empire? Sometimes you got to leave it in the wine cellar to age a bit. Nothing like passing the torch on to your next generation!