My parents have some new friends who have become friends of ours as well. They have two adult sons (22 and 25), both live at home. We would like to invite them and their younger son (+1) to our wedding. Both the couple and the younger son have come to parties, helped FI and I with a house project, etc. We have never met the older son, nor have my parents who have visited the family’s home a few times. Do we need to invite the older son to the wedding?