"You are my bratty stepdaughter and are asking me to take you panty shopping at Victoria's Secret. You are tired of wearing only full coverage brief panties and want to start wearing thongs full time. Let me know exactly why you need thong panties. It can be fashion, like being jealous of what the other girls are wearing, or practical like not wanting to show panty lines underneath your yoga pants or volley ball shorts. You've asked your stepmom to buy you thongs before but she said no. But you know stepdaddy always gives you what you want. Talk about how hard I would get if I was in Victoria's Secret with you surrounded by hot young girls picking out thong panties. Of course I would never get to see you in them, but I would have to be the one carrying the little thong panties up to the register. Once you get me onboard with the idea, demand that I also buy you a new push up bra or a tiny thong bikini too. Overall the feeling should be that you always get what you want out of stepdaddy. Even if it means embarrassing him in a lingerie store."