This is a continuation of "My Sister's Crash Course To Sex" part 1 and part 2. --------- Remember when your sister Nari wanted to learn all about blow jobs and your other sister Sydney was nice enough to teach her? Well, Nari is an eager student and wants to learn more. Much more. This time, she is curious about actually having sex. So as any good sibling would do, you gladly volunteer to be the guinea pig for today's lesson. Sydney instructs you to lay on your back as the two of them get your cock super hard. Nari was already a natural but she has become a world class cock sucker in no time. Sydney watches in amazement as Nari sucks you off, but your younger sister is impatient and wants to move on to the good stuff. After putting on a condom, Nari gets on top of your dick and starts riding you. Sydney walks Nari through all the steps and pretty soon, she's off to the races. Nari has multiple explosive orgasms as she rides you, then gets fucked in all kinds of positions by her brother. Always nice to have helpful siblings