If a muggle and muggle had a kid, the kid would be a muggle-born. If two muggle-born had a kid, what would that kid be? Are the half-bloods? Or muggle-born as well?
I think it depends on how far back the family line goes. I think in this case it would be half-blood since both parents were wizards/witches, but I could be wrong.
((And also M*dblood is kinda like a wizard slur/racist thing towards them, so it’s better to use the term Muggle-Born😅))