A wife who loses a husband is called a widow. A husband who loses a wife is called a widower. A child who loses his parents is called an orphan. But...there is no word for a parent who loses a child, that's how awful the loss is.
May the almighty God grant your family fortitude in this time of trial. Gratitude in the years ahead for the amazing gift that is Owen - for the Angels of heaven stand in awe of humans; for despite their human frailty, they alone can offer up their suffering to God for the sake of others as Christ did.
May God bless Owen and your family.
