After moving away and finally not needing to hide their relationship, a brother and sister go out on a proper date and run into someone from their past. She'll keep quiet, for a price.
Brad and Mary find a porn magazine that starts them exploring sexually with each other. Their mother finds out and decides to help them back to the correct path.
What a nice surprise. I meet my sister for the first time, just before graduating from college. We hit it off great. We continue to hit it off great when she meets our mother.
A sixteen-year-old boy was given a gift by an old man that he befriended but had to swear that he wouldn't open the gift until after the old man's death. It turned out to be a hypnotic eye that controlled people's minds. The temptation to control his family and others as well was far too great for the teen to resist.