Yeah, honestly, the more you try to cover it up, the more obvious it is. I'd take everybody else's advice and smoke elsewhere. Somewhere it isn't sketchy.
smoke it in your parents room, run back into your room real quick and shut the door, wait 2 minutes, then open it up and say loudly 'where is that smell coming from?' walk over to your parents rooms door and say 'wha! u yelled at me and YOU a sucking down a blunt in YOUR room!? well, if u can do it so can I!' then u will be able to smoke in ur room from then on. problem solved. I love it when a plan comes together. :2thumbsup: