The best way to begin to interpret the world around you like OPL is to pretend you only had bad 80s and 90s American sitcoms and cartoons when you were growing up to reference for social cues, interpersonal relationships and family dynamics. The "grown-ups" usually just hung around the house, waiting patiently to dispense little catch phrases, nuggets of wisdom and rousing speeches whenever the leads returned from some silly suburban adventure.
We don't know if Barb ever had friends, or if she cut ties when she stopped drinking or retired, but either way she fits neatly into this sitcom stereotype, just without the love, warmth, advice, and catch phrases.
Too Many Cooks is probably a great approximation of what it's like to live in Chris's head.