Both times were when I was in early high school. The first I almost walked in on it til I knew what was happening and avoided it like the plague. Second they were half sloshed and thought I wasn't home but was downstairs watching tv when I heard somewhat nasty shit being said. Their door was still open. I still remember what was said but I don't wanna say it here
thinking parents are normal people who talk like that when they think no one else is around. After that I went into the basement til it was over to avoid hearing anymore.