Don’t pass word, sister

I was reading a report in New York Times which said that several computer users utilise easy-to-guess passwords. Among the common passwords identified are 12345, abc123, monkey, friends, Iloveu and sunshine.
When I discussed this with a close friend, he asked: “Do you know passwords can create wars at home?”
“What?”
“I was checking my mail one night,”he started. “And went off to bed without signing off.”
“So?”
“My sister-in-law came to the room in the morning and saw the computer on. She was about to shut it down, when she noticed my sister’s name in my inbox,” he paused.
“What had she written?”
“A splash of four-letter words against my in-law. She advised me never to listen to her. Rest of the content I won’t tell you.”
“Then what happened,” the gossip monger in me was curious.
“What will happen? A domestic war erupted. Both of them stopped talking to me for a week. It took a lot of persuasion to bring the warring factions together.”
“Sorry,” I acted as if I am genuinely sad. This is so common in my house, why will I tell him that!
“Anyway I am happy,” my friend concluded.
“Why?”
“My sister-in-law did not see another mail which was much more damaging and had stronger 4-letter words.”