We arrived back at the truck; I unlocked it and everybody piled inside. I was driving of course, and both the girls jumped into the back seat. I eased the big Dodge into gear and pulled out of the parking lot and wound my way to the light. Turning left I accelerated smoothly up thru the gears; the big Hemi propelling us up the on-ramp at good speed. I merged into traffic and glanced into the rear view mirror to see what the girls were up to. Both were giggling and sitting nearly on top of each other, their hands exploring each other's body. Diane had her hands on Susan, feeling her breasts, and Susan was doing the same. Susan reached up from Diane's chest and tenderly brushed her hair away from her face. Susan paused for a moment, looking into Diane's eyes, and then she pulled her face closer and closer to hers, Susan's lips parting just as their lips met. Susan's tongue snaked out and found Diane's mouth, gently pressing between her lips, licking, tasting, and dancing with Diane's. Diane moaned and pulled Susan closer to her, wrapping her arms around Susan's body.
"HOLY CRAP!" I thought to myself as I watched the two women making out in my back seat. I quickly reached down and unbuckled my belt and yanked my jeans open to relieve my throbbing cock of its confines. I pulled on my dick a couple of times and then decided I better quit unless I wanted to waste a load in my truck! The scene behind me was intense. Susan was aggressively kissing Diane, feeling her breasts and pinching and twisting her nipples. Diane was responding with her own kisses, occasionally nibbling at Susan's lips, her neck, and her ears. I drove a little faster, the pure lust in the back seat intensifying.