Stop focusing on her. Psychologically the phone is like a woman's bag. If she feels safe with a guy, she'll let him hold her bag or phone because she has nothing to hide. It's like a security blanket. Right now it's what she's leaning on because it's her tie to "unreality" and the other man.
Look for the free legal advice and see what your options are. You are the one who should be calling the shots because you bring home the bacon. She might be using the phone, but you control how it's being paid. If she's using it to contact the OM, then cut off the service. If your money is going towards your MIL, take it away and use it to get your own place away. Let your MIL deal with her D. There are things you need to do to get your control back.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.
