I'm wearing satin panties and a short skirt. I am talking on the phone with my sister in law while I'm desperate to pee. I tell her I need pee so I have to go, but she says that reminded her of something funny and she tells me about how she accidentally peed in her panties last week, I tell then share some experiences with her, getting more desperate as I chat. As I chat, I keep reminding her I really do need to go pee. Eventually I cannot hold it any more and I accidentally pee completely in your panties. My sister in law knows whats happening as I lose control. lifting the front of my skirt with my free hand showing how wet It is as I pee.