Gym Equipment Swap

I'm the 30-year-old personal trainer at our local gym, married for five years now. Last week, I traded workout sessions with another trainer to play around with the idea of switching roles, me as her submissive, and she in charge. We ended up spending an extra hour after closing time, testing out each other's limits on various machines and having a blast being naughty together. It was all consensual fun, but honestly, it felt so good that I might need to pull this off again sometime soon.