My 18th birthday gift, a cock, What do I do with it? Vanessa Cage & Elaina Raye - Taboo Handjobs

My big step-sister Vanessa gave me a cupcake for my birthday from my most favorite bakery. I didn't expect a gift from her at all. She also gave me a little vibrator with a remote control. I've never seen one of these before. She tells me to put in down my panties on my clit. I told her it feels funny down there. She keeps asking me questions about my sexual experience. I keep telling her that I haven't had any! I mean, I'm only turning 18 today! She can't believe I don't already play with vibrators and says that it should make me feel the way I feel when I'm making out with a guy. I told her I haven't made out with any guys. I haven't seen or touched a guy's dick. I wouldn't know what to do with it anyway.She immediately remedies this situation by bringing our step-brother in as a cock model for me. I can't believe she wants me to touch my step-brother's penis! So gross! I certainly don't want Step-Mom and Step-Dad to find out about this. We all agree this is my 18th birthday secret