Your fart fetish began long ago... Late one night your step-mother came to your room to check out you only to find you touching yourself under your blankets. Your step-mommy was a kind understanding woman and she knew that you needed some help exploring your sexuality. She sat on the bed and starting touching you... and you liked it so much. Things progressed and before you knew it your step-mother's ass was in your face and you experience your first delicious whiff of a fart from a woman's ass. After that you never looked back... you were hooked for life and oh it was so good! Honey, are you still awake? I brought you some water. Let me tuck you in so you can get to bed.... honey... what are you doing under the blankets? Yes you are definitely doing something under there... let me see.... honey! You were... touching yourself? Oh step-son, don't be embarrassed... it's only natural for a boy of your age to be touching yourself... it's ok. Step-Mommy was just surprised is all but I'm not mad. Actually honey, I think I need to show you how to touch yourself the right way. I'm sure you don't have much experience yet and if you don't know how to properly touch yourself you will never get the full pleasure that you could. Here, just let step-mommy grab your penis and touch it like this.... mmmm see? It feels good, right? Step-Son, I think I showed you how to do it just right, now step-mommy wants to help you in another way. I want to show you some things that will help make it feel even better when you masturbate. Boys really like looking at girl butts so I am going to turn around and show you step-mommy's ass and I want you to keep touching yourself while you are looking. Oh yes... you like that don't you? You like looking at step-mommy's big ass while you are stroking.... *faaaart* Oh my god! Honey, I'm SO sorry! I did not mean to fart in your face, it just slipped out! Oh I am so embarrassed, let me get that smell out of there! Ummmm..... did your boner just get way harder after I... farted? Honey.... did you like it when step-mommy farted? You did, didn't you? That's perfectly ok honey, infact, step-mommy is really gassy tonight so if you liked touching yourself while I farted then step-mommy is going to keep farting for you until you have an orgasm. Now go on and keep touching your penis while step-mommy is farting for you!