Addicted to stepmom's feet

I've just gotten home from a very long day at work. All I want to do is kick off my shoes and relax. Hearing a noise I open my eyes to see my stepson standing next to me staring at my feet. We make small talk but he just keeps looking at my feet. Finally, he offers to rub them for me. That sounds wonderful! And it feels wonderful too. It's not long before I start encouraging him to take a sniff which he is very eager to do. Hmmm...I soon realize that this could become very beneficial for both of us....