Uncle should realize that his ED doesn't work on this girl. Since this is a new world, maybe he should try getting kids first before marriage. The lady before already think their married anyway, no need to announce it until it's official.
It's either MTL or being translated by someone who doesn't have a strong grasp of English as a language. A normal person who understands English enough wouldn't just say "I, the singular women," in reference to the single girl.
Also, I'm expecting a cockblock of the highest magnitude by former Hero's Party Dark Elf Mage and Meltyna is going to beat up her former comrade to get that D and also expel all of the intruders to her first time.