Daniel,
This is where Catholic thinking and evangelical thinking diverge.
There are many deathbed conversions. I suspect it happens in non-Catholic families too.
We have no idea if someone like Ted Kennedy confessed his sins and was forgiven as he was dying. I do remember a priest visiting him. That does not mean he has tons of reparation to make up in Purgatory.
Are you aware of non-Catholics for whom families have prayed to come back to Christ — that they do, indeed, convert on their deathbeds?
We’ll just have to let God be the judge.