HIIT it and Quit it

When Yeri sneaks into the women’s gym locker room to catch a glimpse of the hot gym instructor, the last thing he expects is for Andrea to encourage him. She knows he’s watching. And she loves it. She teases him mercilessly before pulling him into a rough, passionate encounter. Just as things heat up, they're interrupted by approaching voices, and Anread hastily hides Yeri in a laundry basket filled with gym towels. The coast clears, and he's back in action, pounding her until she demands his "protein shake" all over her face.