I've even known a couple of CO's over the years. A couple of CO's had a kid who was disfellowshipped. Each time when these CO's visited, their visits were many years apart, the kids of the CO's had been disfellowshipped for a long time.
On a side note, I've often been informed about those who can give talks at Regional Conventions(formerly called District Conventions) I'm of the understanding only ''brothers'' could give talks at large Conventions if they were married and childless, raising a family who were exemplary in the congregation and no problem-child kids at home.
Different if the ''child'' of the CO had grown-up and moved out. This wouldn't be looked at as under the same roof.
As far as talks at RCs(DC formerly) only ''brothers'' who's family at home was doing very, very well ''spiritually''.