A beach day with your family isn't exactly the ideal way to celebrate Labor Day. When my dad and my step-sister Serena hit the sand, it gets boring fast. I tell my step-sister I'm going to lose it & she starts sneakily teasing me with her big natural tits behind our dad's back! Serenea seizes on dad's suggestion to take a walk & drags me to a private area of the beach. She has my dick out & in her mouth in no time, as soon as I'm hard she asks me to fuck her! Serena hops on top & her big tits start to flop as she rides my cock. I bend her over a picnic table & slam her hairy hole from behind. We go for one more round & I make her orgasm, then she drains the nut out of me. Just as we finish up, we hear dad looking for us and have to scramble.., Labor Day just got a whole lot more exciting folks!