Fantastic Pawn shop find

I live with some friends, there are four of us in the house: my buddy and his girlfriend, her younger sister, and me. Three of us are the same age, and the younger sister is two years younger than us. While walking around on a Saturday afternoon, I came across an old pawn shop. So I went in for a look, never know what you might find. Nothing at first took my interest, then I saw something covered by a fine netting material. Curious, I lifted off the netting and saw a Hypnotizing spiral I had seen in old movies. It took my interest, and I asked if it was for sale. It was, and so I bought it, a great curiosity to display. I put it on a shelf with the netting covering it. Then my buddy and his girlfriend went away for a weekend. Leaving the sister and me together, we had been alone together before, and nothing had happened then. Anyway, she asked me why I had bought the spiral. I said it was a curiosity and I liked curiosities. Does it work? she asked, I don't know I answered. " Let's test it she replied, okay I answered nothing else planned. After some spins, she acted as if she was hypnotised. I decided to test her and told her to strip naked, and she did as told. So, I said join me in my bed tonight and she did, we became lovers. She wasn't really hypnotised, she just wanted to start a relationship with me as I hadn't made any move myself. It was a case of being too close, just seeing her as a friend, not a possible lover. We are now in a full relationship, all thanks to the Spiral breaking the ice, you could say.