I like everything about this video. Her hairy pussy, the way the cum drips down to her asshole, and his big intimidating cock. I bet her holes smelled and tasted incredible after getting a workout from that big dick, and I would LOVE to clean them both up with my tongue and mouth.
Have you asked her? She might absolutely love the idea. Women usually notice when their soiled undies have been tampered with. She keeps leaving them there. So, she likes the attention her panties are getting, or she is a pretty unaware woman. Think about it.