sun That may explain the difference between when she was your wife and when she was your girlfriend. Even putting cultural differences aside, after you married her you changed the dynamic. By placing the belt around her waist, you assumed a position of authority and responsibility. You claimed ownership of her right to orgasm. This is a big responsibility, and one that decisively puts you in charge. There are many ways to react to being locked, but in the end, a belted girl's response is one of two things: either they resist it, or they accept it. Your wife accepted the role of a belted wife and that tends to make one assume a secondary role.
Obviously this is not universal to all belted girls. But if the dynamic is one of leader and follower, it stands to reason that the keyholder would end up as the leader and the belt-wearer is the followed.