Do you require your husband/wife to always ask your permission every time he goes out with friends esp when an ex-gf is in that circle too?

We definitely keep each other informed of what we're doing, as for asking for permission, not at all. We're each our own person and it's important to us to uphold that. Regarding the ex-girlfriend, it really depends on the situation and how aware you are of that. For example, if they were in a long term relationship and you know he still has feelings for her, I would maybe feel a little worried. Speak to him about it if you are that concerned, I'm sure his answer would be reassuring. Ultimately, it's you that he has chosen to spend the rest of his life with, so don't get too caught up on it :)