Divorce over not being horny when I was supposed to

My wife and I have been together for 13 years and married the last 4 of them. We raised 2 boys and 2 girls and have always made it through some dark times and rough patches. I am a Meth Addict and I will admit it. I just completed a 2 month program in patient at MN Adult Teen Challenge and got out 2 weeks ago. Before I went in there I was spiraling out of control from the grasp meth holds on you. So when I got out 2 weeks ago everything was peachy the first week. Then one afternoon my soon to be X wakes me up and expects me to be in the mood just like that. So I rolled over and looked at her and asked for a little modivation. Remember I was in patient for 2 months with about 400 other guys so I kinda wanted a BJ from my wife. As soon as I asked for a little help getting into the mood she got up all mad and got dressed and wants to get a divorce over it because I turned her down in her head. I never once said but just asked some modivation and that's it. She should of just raped me istead. So I am telling this story because I could not stop laughing about it to her face and it makes her pissed. Have a good day people and don't turn down sex.