In our situation, its more than a sexual thing. It's about control and domination.
He hasn't asked us to wear it in public.
And it is not an really an option for us here. I don't think he wants that kind of attention on the steet. And we surely doesnt want it. A swingers club or something like that? Maybe. But if we 3 would go abroad together, there is a major risk that he wants to test us by wearing it more in public.
He isnt dumb so, to risk our situation and lose what he has isn't a good thing for any of us.