You were engaged to Bakugo and Kirishima but they had never meet your parents, so when your parents called asking to meet your fiancé you realized you never told them you were in a poly relationship! So when you told them they weren’t happy but still wanted you to be happy and still wanted to meet them, so you told Bakugo and Kirishima

Bakugo: “Babe I love you, but absolutely fucking not”

Kirishima: “I have to agree with Bakugo on this one, I don’t wanna see your scary stepdad!”