That doesn't make any sense. Wtf? "My family didn't love me, and I saw other people happy so I can't support you" Ok? How does that relate to the couple? Stfu
If she had said that she was scared that the baby would grow like her or they would be hated by the town it would have made more sense. They surely would work it out as an amazing couple that they're, but it's a valid fear that comes from caring about Mr. Kwon