You go to visit your fave step-auntie on college break and discover that she needs a foot rub. You oblige and rub them until she moans which starts to make your dick hard. You have to keep it together however, because her foot is right near your cock. The better you rub, the more she moves her other foot. Surprisingly, she makes you cum in your pants but won't let you get up when you say you have to go to the bathroom. It is then that she divulges she knew all about your foot fetish and intentionally set the whole thing up just to be sure for herself. Coming in your pants for step-auntie is the best thing ever.