Leareth is sleeping in a bedroom that isn't his – in fact, in a body that's only been his for less than a day, and even then not entirely. 

He's going to think about what to do with the man whose soul is now sharing it with him...later. Once he's north, and - safe, or as safe as it gets in this world. He's exhausted and disoriented and still doesn't have the faintest inkling how he died. 

...He's still not sure it's the right choice, staying here. It was a tradeoff he weighed and he's not in very good shape for weighing complicated tradeoffs right now. Vkandis could send someone after him much more easily here than if he had instead insisted on Gating a hundred miles away in a random direction and sleeping in some anonymous woods. On the other hand, it's not like he has the reserves yet to Gate far enough that he would leave Vkandis' influence entirely behind. Things could still go unluckily wrong, and here he's not in any danger from the weather or wild animals. Besides, sleeping in an actual bed will rebuild his - their - reserves faster. 

Probably some of it is that it seemed important to Karal, to have - closure, one final conversation with his lord, whatever happens afterward - and it felt cheap enough to offer. Leareth thinks it isn't very much that? He doesn't think he would compromise his safety for it. But he's not sure. He likes Karal, and it's - less obvious than usual that he's at all capable of separating that out in his own thoughts. 

He told him: 

It is not a fair trade. Bringing you home, in exchange for - the rest of your life - it does not make it any less monstrous, that I am willing to do this. But it - cost me very little, and I did want to– I am glad I could give you that much, whatever else happens. 

And Karal - wasn't angry, or even particularly upset. 

Do let me trade my own life away, will you? I won't tell you it's not monstrous, that you do this to people, but-- don't hate yourself on my account, when I'm glad you were there.

And, well, here they are. He genuinely doesn't know what's going to happen from here.

In any case, it's not worth dwelling on it. This is the gamble he made. 

He falls asleep with only a little difficulty.