How can i tell my mom i smoke marijuana?

Marijuana? she found 2 bottles i smoked out of but she hasnt said nothing about it? I think she might know that i do. I kinda want to tell her. I told her how weed is good for you and all that stuff and i just dont know how i can tell her.. PLEASE HELP!!!!! AND DONT SAY SMOKING IS BAD AND ITS ILLEGAL IDC!