just thought i'd add - i did have my sil in the labour ward until i went down for c/s - her and DH get along really well, and she was there just as an extra person to take photos and things - and to have someone with me while he went to sleep (it had been a looooong few days)

SIL was ONLY in there cos DH gets along with her - if he hadn't i'd have not had anyone extra. she stepped back and didn't interfere - she didn't make anyone uncomfy etc sometimes an extra person is a blessing - but you BOTH need to agree on who that is