120] Do-gníth-som ón cech n-iadchi do airiuc thuli di-ssi.
"He used to do that every night to gratify her desire."
or more colloquially
At her wish, he used to do that every night.
I think the routine of giving her a verse to cap has to have been at her
desire or wish, not his. He's on record as not desiring her, but she
would have had an interest in setting up this little game with him in
the hope that it would forward her own plans. If she asked him to, he'd
have been hard put to come up with a reason to refuse to. Now she can
use it to make him look guilty.