[M][fiction/fantasy]My girlfriend is turning me into a sissy cuckhold.

My girlfriend and I have been together for about 5 years. About a year ago, the sex got pretty vanilla. It seemed neither of us were really into it. She suggested we spice things up a little, and recently she’s began incorporating toys and lingerie.

It started with my going down on her using a dildo or vibrator. Then she started using some anal plugs (on herself). This helped the sex life, but she kept wanting more. There was some voyeur stuff, she posted some risqué photos online. But about a month ago it took quite a turn.

She bought a chastity cage for me. She said she just wanted to tease me a little, and would take it off after foreplay. So she locked me up, then made me go down on her. Use her dildo on her, and I brought her to right before orgasm, and, as promised, she unlocked me and we fucked. It was fun, but her attitude when I was locked and pleasing her had me a little worried.