You are wanting a simple yes or no answer, and it’s not simple. The couple would be called to discern, continually, if they have a reason, if it is conformity with objective morality, and if it is still a concern or reason.
They are to take it into prayerful discernment. They would have to discern their financial, emotional, physical wellbeing, etc. And whether or not they could be open to a child at that time.
This is a hypothetical, therefore we can’t answer any further. Any specific couple is going to have a different answer because it depends. Each couple is different with their financial situation, their need to care for special needs kids, no special needs kids, care for aging parents, amount of help they have, emotional makeup, physical condition, age, and on and on.
You have to DISCERN. You don’t just make blanket statements, and if you don’t have an actual reason (“I don’t want to” isn’t an actual reason) then you need to keep discerning.