>>280137496
It's one of the extra chapters.
Notice how Fallin barely pays any mind to Marcille and just talks about hanging out with Laios
>>280140545
The Lion operates on a weird alien morality system and he hardly has a will of its own, even when that Dwarf wished for the end of the world the Lion felt obliged to do his bidding even when he didn't want to do it.
So I think it's fair to say that he did his part of the deal as soon as he got into Laios' body.
If I recall correctly also, that line about Marcille in the original Japanese was something along the lines of having her being able to conceive.