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...
Didn't you go celebrate your 
sister's wedding yesterday?
ألم تذهب للاحتفال بزواج أختك البارحة؟
Warst du gestern nicht zum Feiern
bei deiner Schwester?
¿No fuiste a ver a tu hermana
por casarse?
¿No fuiste a ver a tu hermana
por casarse?
Tu n’as pas fêté
le mariage de ta sœur ?
Ieri non sei andato a festeggiare
 il matrimonio di tua sorella?
Não foi comemorar o casamento
da sua irmã ontem?
Разве не сестру вчера
поздравлять ходил?