One family, two systems

Under one roof, two different people living together

On one settee, two decoys looking deadpan

Over one goggle box, two fools fighting for a TV channel

In one kitchen, two slow-witted friends clattering over a trifle

At one table, two birdbrains carping at each other

In one bathroom, two agile otters occupying  a single pocket of turf

In front of one big mirror, two opponents snarling at each other

On one bed, two nemesis having a confrontation

Over one idea, two minds clashing

In one family, two systems never working