In the sauna

I keep telling myself I won't do this, but the steam hits and my mind goes straight to some stranger who just walked in. Before I know it my hand's between my thighs. I rub slow at first, feeling how slick I already am, then I spread my legs wider on the bench and start working my clit in steady circles. Every time the door clicks my heart jumps and I get wetter. My big tits bounce with each thrust of my fingers, nipples stiff from the heat and the filthy thoughts. I can't stop. I press my sole against the warm wood, toes curling, loving the way the air sticks to my bare skin. The pressure builds fast. I bite my lip to stay quiet but a little moan slips out anyway. My pussy grips my fingers hard as I come, thighs shaking, and all I can think is that next time the stranger might not just be in my head.