In order to prove to Yuri that they are actually a married couple, Loid and Yor are supposed to kiss. Loid is willing to get this done immediately for the sake of Operation Strix, but Yor can't do this sober, so she ends up downing a bunch of wine and gets drunk.  Yuri sees his sister this way, also gets drunk, and is unable to make rational decisions anymore...
there'd be no concern over suspicions 
arising about her being single.
فما كانت لتقلق حيال الشّبهات
.الّتي قد تحوم حولها لأنّها عازبة
hätte sie sich keine Gedanken machen
müssen, verdächtig zu werden.
no le preocuparía ser soltera.
no le preocuparía ser soltera.
elle ne s’inquiéterait pas
de paraître suspecte.
non si sarebbe mai preoccupata
di destare sospetti perché nubile.
ela não se preocuparia com
suspeitas por estar solteira.
едва ли переживала бы
об отсутствии брака.