NO R TALKS! At this stage they will only damage things as your H is still in the "I'm done for good" state of mind. Nothing you can do or so will change that at this time.
You cannot guess what he is thinking or feeling and at this point it seems he is not ready to talk about it. For all we know he could be making an attempt to be extra nice to you as he knows you have an appt. to seek legal counsel later this week. Speculation wastes precious time and energy and all that energy needs to be focused on you, your changes and the process of detachment.
There is nothing wrong with setting boundaries. For example, him sleeping over without prior discussion about it. I personally would not allow that. My home is not a hotel. But when you push a WAS spouse for answers, even in a controlled setting such as MC, chances are the answers you will hear won't be what you want.
It took much longer than 2 weeks for your marriage problems to begin and it will take far more than a pleasant week of exchanges for them to be solved.
If you don't like being in limbo then set boundaries and remove yourself from limbo. Listen more than you speak and attach NO expectations to anything your H does right now. If and when he is ready to have a R talk he will let you know. If he asks what happens when you meet with your legal counsel I would simply tell him that it was a productive and informative meeting and leave it at that.
I still think you need to make yourself far less available to him. Right now he has full control over the R and knows you will jump at any chance to see or talk to him. When he calls, wait 24 or 48 hours to return his call unless the call is about the children. If he wants to come over tell him you have plans and be vague about what they are.
You need to regain some measure of personal power.
