They're engaged, not married. We used Fiance 2 chapters ago, and people just went "They're married now?!", so we used Hubby because it keeps every option open.
More specifically, we don't know what they are. As the TL, my guess is that they're not officially married yet, and I'm hoping to see a wedding in the next chapters to justify my choices lol.
I didn't want to go the fiancé(e) route like two chapters ago because some people were insistent that 嫁
yome (how Takeda referred to Igarashi)
must mean "wife" and nothing else, so now I'm just playing for both teams because "hubby" sounds to me like something you could call your official husband, but also someone you're going to marry soon 🤷♂️