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...
Was I being far too suspicious by 
looking at ads meant for families,
،هل كنت أتصرّف بريبة أكثر بقراءتي لإعلانات للعائلات
Como no parezco una esposa
Como no parezco una esposa
Ho destato sospetti perché guardavo
Estou sendo suspeita por
olhar anúncios para famílias,
Я же вообще на жену не похожа!