Billy
I've read somewhere(don't remember where)that ankle bracelet(jewellery,not as GPS,as mentionned oh another thread)is a sign used in SM relationship,showing people the woman is a submissive,and depending on which ankle,she has a master or not...Do you want to use it in this purpose?
For it,and the chastity,as long as she agrees,and even better if she enjoys it,it is totally ok,in my opinion.
Angelina
Yes,they're cool with it.
Billy
Yes,but finding one who accept it,and want to live this lifestyle,can be hard.
Anyway,good luck!