Luna and Eric had been dating for a few months now. Their sex life was amazing, but Luna had a strong submissive side to her that she had been too afraid to show him. She was addicted to watching BDSM porn and would hide it from him. She would sneak outside the bedroom and 2am to watch BDSM porn and touch herself every night.
It didn’t take too long for Eric to notice, though, as her moaning was not discrete and it would wake him up. But he decided we wasn’t going to say anything, as her moans of pleasure would turn him on as well, and the sounds of the porn would give him a good idea of what she was watching. He also really enjoyed to pretend he was sleeping when she came back to bed, and hug her from behind and feel her wetness. The fact that he had to control himself, knowing she was hot and ready to fuck, excited him. It made him come in and out of horny dreams throughout the night.
He decided he was going to surprise her. He went to a sex shop alone and bought a collar with a leash. He went back home and hid it from her sight.