My wife = stubborn = q

My stubbornness = wife stubbornness + 2 = n

q + n = a

a = forces to be reckoned with

q - n = P

P = a sleepless night

The nice thing about being so stubborn, we are both seriously committed to fighting it out. Never surrendering to long term bad feelings.

So we work things out pretty quickly. We just scare the pets in the process.

But I pity the fool that gets in our way when we are united...