you need to get a close up shot of the nodes where the stems meet the main stem... that is where it woud show it's sex. Also, you would need an enviornment to grow it in like a closet etc. somewhere you can make totally dark 3 cfls might do the trick compared to the alternative of death to that baby of yours. It's worth a try. you maust maintain a decent temp and humidity level as well...
Is there a place in your yard anywhere that it won't be so noticeable and let it finish out naturally? Might be your best bet. If not it is ok to grow indoors, but there are a few different variables you have to cover......