As soon as I saw you post that you'd reconnected with her (after all the horror stories) I knew it would not end well.
Seriously, celibacy is far preferable than bad news chickadoos.
And really... if shiz is goin' down just call the cops. Don't get yerself in any fuzzanky situations. I had a friend get himself tossed in jail (and he was NOT a jail ready dood) for thinking he could handle his nasty ex's shenanigans on his own.
You just got your life sorted again. Enjoy and don't let others (or yourself) blow it for you. Please.
Good luck.