I checked back and it said they got married in the beginning of Chapter 8, that line just probably means like he's proposing again Wazmahnem
Lmfao i read it wrong as them being mates for 2 years, in the back of my head the manga so fr screams "being mates is more intimate/special than marriage" similar to that one manga (which i forgot)
"Sounds like a proposal" WHAATT are they not married yet???