setting boundaries when not clear if A is over

[Piano]

Starting a new thread because my sitch has changed a little.
My H's PA has physically ended and will most definately remain that way (due to the fact she lives on the other side of the world). But it's hard to say if the emotional side of the affair has ended (he was infatuated with her for at least 5 months before it started. The PA itself only last 6 weeks).

We have been seperated since Xmas. In that time I have only asked a few times about the status of the affair. One month ago he said 'it's not over' (maybe to bait me) and then a week ago 'there is no relationship' (to appease me?). Not terribly, terribly clear to me what's going on.

The thing is, I feel I cannot be 'friends' or work on co-parenting while he is not transparent with me. Last week we had one not so good co-parenting counseling session - he's still keen to keep going though. Me not so much - too upsetting. Baby born in 2 months time.

Thanks for any advice on a good way of expressing something like following in an email to him : "While you remain unclear to me if you are building a life with someone else, it's difficult to me to accept the idea of trying to remain friends or to continue co-parenting counseling. Contact with you is painful for me and I want to protect myself and our baby. I need to be able to trust you & you are not being transparent with me today. Until you are, I'd prefer no contact".

I think it's about setting boundaries that work for me, without being too threatening, but which protect me and my unborn first child from more upsets.

Would appreciate any advice....