I'm male, 21, live with my parents and grandparents (financial issues)
For about a year I've been doing self-bondage. Usually very late at night, when I know everybody's asleep. I take all precautions I can (specially doing it only when the grandparents are not at home - fortunately, it's rather often), and for that year it worked. But Murphy's Law can never be fully prevented, and today it hit.
My mom got up and came to my bedroom to ask about why my dad's PC was being noisy - something that trivial. She caught me lying on the floor on top of my robe, with my legs tied criss-cross to my waist, and a homemade ballgag in my mouth (made of a huge knot wrapped in tape). Fortunately my hands weren't hogtied yet, but that didn't make the situation any better. Neither did having a bunch of ropes and a roll of tape around.
As much as I explained her it was a fetish and not abnormal at all, she went about how scared she was, how she thought I'm not normal for doing this, how strange it was for me to opt for this instead of going out clubbing to get a girlfriend (which obviously has nothing to do with it). I asked her not to tell my dad, to which she replied "I'll think about it", so it's safe to assume she will. And so she left. One hour later I'm writing this topic.
Any feedback is appreciated, hopefully it'll get through to me before they send me to a shrink. They're capable of that.