I'm having problems with a Jehovah Witness MIL wanting to push her religion on my...

[Al T]

...family. Im Christian.? I was brought up in numerous denominations, but choose to be just a Christian. I know that Jehovah Witness call themselves Christian but I find that I don't agree with what they teach. My Mother in law tries to explain to me the differences in the two religions and that Jehovah Witness are the only true Christians because all other religions are based on 'unholy, fake doctrine' of the Trinity. I can't talk to her because when I do she goes back and tells my wife that I'm a liar and that she needs to get back into the meetings and then my wife comes back at me with all this stuff. So basically all I'm wanting is to get some information from other Jehovah Witnesses. Let me add that I do not agree with most Jehovah Witnesses teachings though.
I'm not wanting to change my Mother in Law's belief, but trying to help my wife to understand. I have went to church all my life until we got married and things just got into the way of going. My wife, however, only goes to the JW Passover once a year. So I'm trying to get us all involved in a Christian church.