Step-Daughter Caught with Nipple Piercings

I noticed a change in my step-daughter Aria's behavior when she declined going to the pool last weekend. As I passed by her room, I overheard her confiding in her friend about her recent nipple piercings, fearing my punishment if I found out. I was taken aback by what I heard.
I stormed into her room and insisted she reveal her new piercings, I made her lift her shirt. Questioning her motives behind this act, knowing it was said to heighten sexual pleasure. I probed further, exploring her sensitivity by touching her pierced nipples.
Her reactions confirmed her heightened sensitivity, responding eagerly to my touches. I proposed a deal, ensuring her silence in exchange for more intimate exploration. Aria and I indulged in some playful and forbidden moments while her mother was away.