Quote: He said he had been watching me all week. Every time H went in the other room or to the bathroom, he would touch me
Eeewww. Creep alert! I would be decisive and firm in situations like this. In my estimation (and from my own experience with female comer-onners), a really good way to handle situations like this is to tell them right off the bat that you are sorry but have absolutely NO interest in other men, that you are very happy with your H and your M (whether its true or not), and immediately start telling over the top cute and happy stories about you and your H and how amazingly perfect you are for each other. It generally works.
And while its no good to overanalyze or make a big convo out of it on so little sleep, I think you should let H know later today or tomorrow. This is just my opinion, others may have a different opinion.