Atwisted smile played about Harley's face as she noticed Mockingbirdturn back towards her while they were mincing their way to theirbathroom.Mockingbi...d begged with her tear stained eyes, "Please sis, we need tohurry, I don't wanna stain my sexy panties," she intoned in a veryembarrassed voice. "it is very uncomfortable walking around withpanties crusted with my menstrual flow." her little sister finishedstating.Harley knew then and there that the suggestions she had made to herlittle sis were. I called them sisters, but they were really step-sisters. Tammy’s dad had married Tonya’s mom. They were only five when that happened. They shared the same bedroom, and became best friends almost instantly.When puberty hit, the started playing doctor with each other. It quickly escalated to where they became lovers. Their parents didn’t know about this until it was too late. They were inseparable and in love with each other.Their parents died in a car wreck when they were eighteen. Together. " And wet. Wouldn't you like to stick your pecker in there?" Debbie, please!" I know! I'll just sit here on the desk and put your stupid calculator between my legs. That way you can diddle my pussy while you work the calculator. Here, try it. Punch some numbers." C'mon, Debbie. I'm trying to study." Punch." Aw, Debbie..." That's good, right there. What was that?" Square root. Let me study, Debby. Please?" Do a logarithm. Let me see what that feels like." C'mon, Debbie..." Whoa! Do that again.. So it made my force stronger. Suddenly she discharged for the first time. I pulled out my dick and saw her cum. I wipe it my hand and sniffed. I also let her sniff. She smiled and looked her pussy. Spreading with her finger she found bleeding herself.She lost her virginity. “Now I have become woman and I am feeling victorious. You dad broke my virginity.”She told me. I gave her a kiss and made her lying. I widened her leg and pushed my dick again. Now it was feeling much smoother so I thought.