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...
Since he's with the secret police...
...فهو من الشّرطة السّرّيّة
Bei Geheimpolizisten …
Si es policía secreta, o mejor dicho,
Si es policía secreta, o mejor dicho,
La police secrète est capable de tout,
et surtout son frère.
Visto che fa parte
 della polizia segreta... Anzi...
Como ele é da polícia secreta...
Из тайной полиции всё-таки…
хотя нет…