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You’ve decided to accompany the family to their vacation home for the weekend. Your niece comes home early from a hike with her parents, complaining about the heat and her sore feet. You seize the opportunity to offer her a foot rub and she gladly accepts, seemingly thrilled by how much you seem to enjoy petting her pretty feet. It doesn’t take her long to pick up on your arousal and she decides to test the waters by ordering you to suck her toes. Playtime with her uncle excites her and she pulls off her panties to touch herself as you lick and caress her soles. Sensing you need more, she gets her feet slippery and wet with spit before giving you a steamy foot job, continuing to touch herself until she orgasms with your cock between her toes. You’re ready to burst, but before you can come on her feet she takes you into her mouth and swallows your whole load. Now that you’ve gotten a taste of each other, the two of you will never have a normal relationship again. You make plans to enjoy each other for the rest of the weekend and she smirks as she reminds you you’re now her foot slave for life. (Initially a custom commission but no personal names are used)