This one happened a while ago. I remember it as the day Guardians of the Galaxy 2 came out.
Me and my ex went to see it in the cinema. It was a very busy cinema nearly full of people.
She wore a very skintight dress, we had been out to dinner before. She had this big coat on as well because it was cold.
We were about halfway into the film when she puts the coat over both of us covering our crotches mostly and I feel her shuffling around.
After about 30 seconds she passes me something under the coat, I realise by the dampness that they were her pants.
She takes my hand and gets me to slowly finger her pussy. I get a bit anxious with the people around and stop just because it would be awkward to get caught.
After the movie finishes we get back into my car and I was going to drop her home. While driving I realise I still have her thong in my pocket. She gently caresses my thigh as she tells me to find somewhere quiet.