I was house sitting for my sister last summer. I went downstairs to put some laundry in and knocked over a box on the way to the washer. A couple of older playboy magazines fell out. I started paging through and felt myself getting very wet. I never thought of myself as even bi-curious but felt myself getting my pantyhose wet.
I figured what the heck and opened up a couple of my favorite pictures and went for it. As I am laying there with my skirt pulled up and my hand in my pantyhose rubbing hard I open my eyes briefly and see my sisters friend Jen watching me.
Shocked I pulled my hand out and sat up. She said it was too late for that I had already started. Looking down her hand was in her pants going crazy. She sat next to me and we both got off watching one another. Never talked about it again.