"I Know You're Flashing People! Show Me What's Under Your Trenchcoats" - Fucking for His Silence

My stepsister and I love being naked. There's nothing like flashing someone in public. Why shouldn't we be allowed to show our tits to anyone we want? The thrill of almost getting caught gives us goosebumps every single time. We never imagined the person who would catch us would be our stepbrother. When he said that we had to suck his cock or he would tell our parents, we thought that we could just do it, forget it ever happened, and go back to doing what we like, but then sucking turned into fucking, and well... he has a really nice dick. Maybe using our bodies for more than flashing strangers is not such a bad idea.