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...
but I'm probably not acting like a proper wife.
.لكنّي على الأرجح لا أتصرّف كزوجة حقيقيّة
aber ich wette,
ich war keine überzeugende Ehefrau …
pero no estoy interpretando bien
el papel de esposa.
pero no estoy interpretando bien
el papel de esposa.
mais je dois vraiment mal jouer
le rôle de l’épouse…
ma è molto probabile che 
non mi stia comportando come una vera moglie.
mas aposto que não agi
como uma boa esposa...
но я, судя по всему,
жену играю просто паршиво.