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...
It appears that Yor is trying to seem more 
wifely for the sake of our pretend family.
يبدو أنّ يور تحاول أن تبدو كزوجة
.من أجل صالح عائلتنا المزيّفة
Will sie eine glaubwürdigere Ehefrau werden,
damit unsere Tarnung nicht auffliegt?
¿Intenta mejorar como esposa
por el bien de nuestra familia falsa?
¿Intenta mejorar como esposa
por el bien de nuestra familia falsa?
Elle veut devenir une meilleure épouse
pour avoir l’air plus crédible ?
Yor sta cercando di migliorare la sua performance 
come moglie per il bene della nostra famiglia di facciata?
A Yor quer parecer mais como uma esposa
pelo bem da nossa família de mentira.
Погоди-ка…