This isn't the first time I've read about a cheater who tries to lay all the blame on their innocent spouse. The only thing I can assume is that because THEY are a liar and a cheater, they just assume their spouse must be too. The really strange thing is that often they become wildly jealous of an OP that doesn't even exist. It's like their brain is short-circuiting or something. That's really what it sounds like, he's extremely jealous and he's taking it out on you.
Anyway, I think you did well to just ignore the messages. You were in a no-win situation, if you reply and deny it then he accuses you of lying, if you say nothing he accuses you of verifying your guilt through silence. I suspect that now that he's filed he wants you to beg and plead with him to stop, because don't forget this is ALL ABOUT HIM. Now you've got to decide if you are still interested in reconciling or not. If you are, I would just ignore the filing unless you're painted into a corner and have to respond.
