Becoming my Step-Sister's FIRST for EVERYTHING

So our guardians are complete lushes, and today like most weekends they came home completely destroyed. Not only that, but they left some beverages laying around that my I decided to steal for us. As we down those and start to get loose I start asking her all sorts of questions, mostly about sex. It eventually leads to me asking me if she is still a virgin, and then making her feel bad about not knowing how to do ANYTHING sexual. Meanwhile, I am recording us the entire time, even though she keeps asking me to put away the camera. One thing leads to another and now I convince her to touch my cock for the first time, and then put her mouth on it, and then I am between her legs eating her pussy and giving her the FIRST EVER orgasm she's had. It was so overwhelming that she felt like she was peeing, so she immediately runs to the bathroom and I follow her. I tell her how much guys love seeing girls pee so she lets me watch (and film her). Now, I convince her she is ready to lose her virginity, and what better way to do that than to lose it to me. I told her that way she can pretend that she is still a virgin, but know exactly what to do! So, even though we have no condom, I take her virginity. She begs me not to impregnate her, but I don't pull out quite in time. It's not big deal though because I know the secret to not getting pregnant, I just have to eat up all the cum from inside and on her pussy. So I do, every last drop. Everything was going fine, awkward, but fine; until we hear them outside calling our names!