I've basically told my mom, and my dad doesnt come near my room- I'm a daily smoker and I like smoking in my room too, I used to open (not ridiculously wide but more than a crack, use fuckin judgement) the window and smoke by that, my sister has a fan, candles are more subtle than incense, hm, my friend Tido used Frebreeze...If shes really militant about it and would question the Frebreeze your best bet is probably gonna be window, an inexpensive little fan...so forth