Ok, I'll try and answer what questions I remember. Cell phone- I have my own from work and she's on a family plan with her mom and sister, so I really have no financial tie to her phone (her mom pays the whole bill for all 3 of them) Bills- We have always just autopaid 99% of them through our bank account. There are a couple stand alone ones and I usually pay them. Last night when she was talking and laughing so loud to make sure I heard her, I just went to the bedroom and turned on some music. Not blaring it or anything, just enough to drown it out. I probably should have told her that if she wanted to continue talking to him, take it outside. If it becomes an issue again, that is exactly what I plan on saying. Of course, I have to figure out some sort of consequence if she refuses, without being over the top.
I know that the secrecy of their fling is totally gone, I mean, she openly admitted that she was chatting with him yesterday afternoon before I cut the internet. But, In regards to OM thinking he's getting involved with a loony, I doubt it. She is a master manipulator, I have no doubt that she has spun this entire situation to where 150% of everything going on is my fault and she's just "trapped" in this horrible situation with this child who's being immature and mean to her.
And yeah, I know that she's so used to walking all over me and not getting any resistance before, that she's going to push every button and throw everything, probably including the kitchen sink at me to try and get me to slip up or cave. I know that's what she's expecting.