To me this is a fear based mindset, you think that by trying to control every variable you can insulate yourself from the risk of everyday living.
Personally, im never going to tell a girl not to talk to xyz person. I am EXTREMELY relucant to get into relationships because I believe they are generally absurd constructions of a possessive human ego that needs the security and comfort of another person to call theirs. So when I do get into one, you can be damn sure that out of the two of us I will care less, or preferably we both care equally little.
Saying that women will not remove her other options and make herself obviously available and transparent when she is trying to get you to commit betrays basic experience that every man will have with a girl who is attracted to them, I cant put it any other way. You WILL know when you are what she wants, you WILL know when she is losing attraction and thinking about moving on.
This isnt rocket science, the amount of legal jargon thrown around by the boundary crew like "due diligence", "explicit communication", "removing ambiguity", leads me to believe you guys probably have some depressingly boring, controlling relationships.
Who gives a fvck about all that? Life is too damn short to be constantly positioning, evaluating, scrutinizing her every move. Bang a lot of girls (if you want), enjoy them, some will stay longer than others, you'll get burned by some, you will burn some of them. Nothing lasts, attraction rises and falls, keep moving.