I [M] think I just caught a stranger [F] masturbating in her car

This happened barely 20 minutes ago.

I’d just finished a heavy upper body workout and left the gym to go back to my car and smash back my protein shake.

I’m sat in the driver’s seat and I can see a transporter van with its windows down on the other side of the car park, and in the driver’s seat is a pretty middle aged woman with brown hair. She is sat with her head back against the headrest and her eyes are closed.

I noticed that it looks like she has her leg up on the dashboard and she is gently caressing her knee with her finger tips. This perks my attention so I decide to turn off the engine and continue to watch her.

She looks left to right as if she’s scanning the car park (which is packed) then her hand slowly moves up from her leg to her shoulder, then to the side of her face, gently caressing her cheek, and then very quickly she sticks her finger in her mouth as if she’s wetting her finger tips.