In this one, it could go one of two ways.
1. I could be caught breaking into your house and going through it, unaware that you were a bdsm/fetish lover. As punishment, you would keep me as your slavegirl, pet, enslaved maid.
2. After many break ins at your bdsm sex shop, you wait at night one night to catch someone in the act, and you do. You would catch me and as punishment, keep me as your themed slavegirl, attendant, model, always gagged, with a chastity belt locked on so that I couldnt tell anyone that you had kidnapped and enslaved me, and could distract me in case I tried to get help.
If either of these take your fancy, let me know