According to Belami Online, this is the last scene of Billy Cotton in their archives.
It’s in two parts “Normally we film our flip-flop scenes over 2 days, but the boys had a few days in between filming the 2 parts of this scene, so plenty of time to recover energy and rebuild vast reservoirs of cum.“
Part 1 had Billy as the bottom to Andrei Karenin.
And, Billy was the top in part 2.