I always knew during the separation that any intimacy would be a sign that he was officially back with me.
We were intimate one time before moving in together again. I don't remember exact dates, but from what I remember, we were intimate and then began making plans to move back in together soon after.
Of course, when he first told me he wanted out of our marriage, he said that even sleeping in my bed was inappropriate.
Near the end of our separation, he spent the night with me, without intimacy quite a few times before he made that move.