I'm wondering the same thing - I'm at 30 weeks, and i have made the decision to ask my MIL to be there as i get along really really well with her, and feel alot more comfortable around her, especially when i know i will probably say a few choice words - also cause i know that my DH will get support as well. I love my mum, but she frustrates me and is very opinionated about certain things already. I know my MIL will be a great support and give me the strength and help that we will both need during the labour. Like all the other ladies here have said - ultimately its your choice, and you should be free to feel comfortable with that decision. That being said of course i have chickened out and not told mum yet that i have asked MIL to be there, cause i KNOW what her reaction will be like typical.