Alb, I feel for you girl. Of course you know of the no expectations at this point. You did say that above. I wondered what it would be like for my W to start doing this as well. Right now I feel very uneasy about this for you. I would not trust a thing.
I think he is still very broken and you should keep that on the top of your priority stack of thoughts in your head. Of course you will do what is comfortable for you.
In my opinion, if my W was doing this in my sitch, I would insist on her continuing with her IC and I would be watching and listening closely. Actions must match words. There seems like there is a very long way to go even if there is a beginning to the road of recovery. After a few weeks or a month, the actions better match the words. Sex for me would be out of the question. Not that I would not want it of course but I am not going to be her emotional "Fix" and have her run off again.
That is my 2 cents.
So for your sitch, it will probably be different. This stuff is hard. That is why I feel for you so much on this. I know the emotional havoc that will have to be there for you no matter how it goes.