Hi PL....thanks for hopping onto my thread with your lifesaver when I wanted to jump off the cliff of "I am SO done with this crap." Ahhhh. Although, with each day, the edge is closer.
So, about the txt message. You can do 2 things....1) nothing at all. 2) send it back to him saying "you sent this to the wrong person." and leave it at that. That way, he sees that you know, you are not being mean about it, letting him hang on teh rope that you dropped. It gives you some integrity to acknowledge the situation too, that you're not playing stupid in his little A game. But, you're not a raging lunatic about it either.
Then, don't bring it up again, he gets the point.
If this is MLC, and your H's childhood issues, then this is a twisted ride. I think we get caught when we impose our own values, timelines, rationale to things and we get so angry, hurt.