I'm getting married in a few months and now that plans are speeding up, everyone is getting more involved in the wedding plans. Everything has been going great except for my long standing issue with my step mother. I do not see her or my father very often as I have always lived with my mother in a different city. They are no longer together never married but lived together since I was 2, yet still make trips to visit me and my sisters as a "couple". Now and only now that I have been engaged she is nearly trying to take over my mothers role in the wedding; asking if she can drive 6 hours to help me look for dresses, wants to be a part of the receiving line, and is even signing "mom" to my engagement cards....
We have never had a good relationship (she never had her own children because she didn't like kids and wasn't that great to us growing up) and all this prying is starting to upset my mother......
How do I tell her to back off?