For those not in the know, Remilia is taking Demitri Maximoff's pre-battle pose, while Yukari is taking Morrigan's.
edit: Also, Yukari's comeback crack mentions sekihan (red rice), a dish commonly served to celebrate a young girl's first menstruation. The translation used keeps the spirit of the exchange, but couldn't squeeze in the age-related putdown duel in the process.
Remilia said: You talk pretty big for a post-menopausal old spinster!
Ouhhhh, BURN!
It's writing checks the rest of you can't cash.
approximationDid I just hear you talking smack about my uncle?You're letting your mouth get away from you, little runt.Whoa...When did Ojou-sama get here?Looks like we have an intermission.You talk pretty big for a post-menopausal old spinster!Th- this is...