It is totally up to you, but I'm personally really happy that my mom is going to be around for the birth and to help out afterwards. Of course, first she asked if I wanted her to be there and my sister also offered to come if I wanted her to. So I'm really touched and excited to have them around for support.
However, I also know that I'm lucky to be close to my mom and she is very careful about boundaries. She will be staying with us (only because I asked her to or she would stay in a hotel) and be helping us with some stuff around the house, not to mention bringing us a fancy new tv! But she isn't the sort to give unwanted advice, rearrange my cupboards, or telling me what to do. I know its hard for her sometimes but she is really good about treating me like an adult and I really appreciate that. My husband also has no problem with her coming to stay with us, but he will have a month off after the baby is born, so there are a number of reasons I'm really happy to have my mom and sister around but I know its not the same for everyone.
