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...
Perhaps my feelings were what 
was truly being tested here!
!ربّما مشاعري هي الّتي كانت تُختبر بالفعل
Am Ende wurden eher meine Gefühle
auf die Probe gestellt …
De hecho, fueron mis sentimientos
los que se sometieron a una prueba.
De hecho, han sido mis sentimientos
los que se han puesto a prueba.
Finalement, ce sont mes sentiments
qui ont été mis à l’épreuve.
In realtà, probabilmente 
sono stati i miei sentimenti a essere saggiati!
Talvez meus sentimentos é
que estivessem à prova aqui!
Да и ощущение такое, что проверку прошли
мои собственные чувства!