IMHO, Brit's a little more advanced in this, in certain ways.
She is moving on and yet has chosen to continue to be friends with her H, regardless. As she mentions above, she will not chase an attached man.
Zig is still in the process of becoming genuine. I think that using her WAS as practice to being genuine and seductive is OK.
I personally think it's OK for her to have sex with her H, so long as protection is used. I think she has proven with her one episode, that she can remain detached even after intimate contact. And if she never does it again, fair enough. She gets to make that choice.
And in the mean time, she moves on.
And if or when her H ever begins to actively and consistently pursue her, she can set the conditions and the boundaries of what he can and can not have.
