This refers to specific product lines or popular influencers within the Hotwife/Cuckold community known for reviewing high-end gear. They focus on "Double" or "Portable" units that allow couples to stay connected even when they aren't in the same room—or even the same country.
Jack, eager to escape the awkward tension, nodded and followed Mr. Charly down the narrow hallway. jackandjill and mr and mrs charly hotwife doubl portable