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...
Well, I can't let a guy like 
that be with my sister.
ولكن لا يمكنني السّماح لرجل
.مثله أن يكون مع أختي
Aber ich kann diesen Kerl
nicht akzeptieren …
¿Y dejar a mi hermana con ese tipo?
¿Y dejar a mi hermana con ese?
Mais je le supporte pas…
Quello non si merita mia sorella...
Não posso deixar um cara daqueles
ficar com a minha irmã.
Ну не отдавать же сестру козлу?