Heaven is not a physical place nor is it a retirement destination. It is a reflection of the inner quality of your heart and mind (that is why the Lord said that His kingdom was “within”).
It is true that family members and loved ones can meet up with each other in the spiritual realm, but once the process of having one’s inner reality opened up begins, individuals start to go in the directions that their own hearts (spirits) take them. For a family to stay together in the Spiritual realm they would have to share the same inner realities—which is rare.
In heaven, individuals gravitate toward those who share similar affections and beliefs. This allows people to find their true spiritual families and communities.
Genetics is tossed out with the decay of the physical body.
Husbands and wives have the greatest potential for creating stronger relationships throughout eternity. But this eternal intimacy is according to their willingness to become spiritual partners with the same spiritual values and goals.
Of course, most of us on earth would like to design heaven according to our own hopes, wishes and comfort factors, rather than on God’s Truth and Wisdom.