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...
Who'd have thought Yor's 
brother would be like that?
من كان يظنّ أنّ أخا يور سيكون كذلك؟
So hätte ich ihren Bruder
nicht eingeschätzt.
Conque así es el hermano de Yor.
Conque así es el hermano de Yor.
Son frère était vraiment spécial.
Chi avrebbe pensato che 
il fratello di Yor fosse così?
Nunca pensei que o irmão
da Yor seria assim.
Не ожидал, что брат Йор
окажется таким!