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...
How lewd!
!كم هذا بذيء
Seit wann bist du so frivol?!
¡Esto es una tragedia!
¡Esto es una obscenidad!
C’est trop indécent !
Quanta lascivia!
Que indecente!
Да что ж это за разврат?!