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...
I'll reward you with a kiss.
.سأكافئك بقبلة
Das gibt ’nen Belohnungskuss.
Toma, un beso de premio. Muac.
Toma, un besito de premio. Muac.
Un bisou pour te féliciter.
Ti meriti un bacio come ricompensa!
Um beijinho de recompensa.
В награду чмокну в щёчку.