Maybe the girlfriends are cheating with one another and their partners find it hot. More likely it's "oh hi there's my girlfriend waiting for me, look at this new friend I made!"
Fuck ai translations and the replacement of translators. Ai translations are garbage and even the worst human translations are better, but there's plenty of good official human translations. I hate it when people defend ai, and in that regard screw the author for that behavior. I dropped the series and sold my physical collection of it when that happened.
^Yeah I think that's it. I'm pretty certain the connection here is Madoka and Alina as the two cute and innocent girls becoming friends, and then their girlfriends that are willing to burn the world for them seeing how cute they are.
The artists comment on this is "Deer and Idiots"; so I believe the connection is actually that the Kana in Madoka Kaname means "deer". (The whole name apparently means "doe-eyed"? Idk I don't speak japanese.)
^There is that and the artist called it a double date, though I think my point still stands here as well, because Alina and Madoka are cute innocent looking types that are shipped with partners that would burn the world for them lol