It is always easiest to broad brush, to speak in broad generalities without letting the light shine clearly.
In our daily walk, we focus on a number of key passages which are pivotal for dealing with relational issues biblically.
We are always to start by searching our own heart, exhaust all the key passages and instructions and wisdom and then proceed gradually step by step from there to our relationships one at a time before assessing our families etc.
For relational issues and walking in the light we have
Matthew 18
Galatians 6
Hebrews 3:13
2 Corinthians 13:5
1 John 1
Then, we also have
1 Peter 4:8
1 Timothy 6:5
“The end of all things is near. Therefore be clear-minded and sober, so that you can pray. 8 Above all, love one another deeply, because love covers over a multitude of sins.” 1 Peter 4:7-8
…
“…controversies and semantics, out of which come envy, strife, abusive talk, evil suspicions, 5and constant friction…” 1 Timothy 6:4-5
Wisdom in the WORD 