Well could not mean a birthday party but a welcoming (to something ) party... ok that there was a pregnancy in the middle, but mila seems a lot more close of anna then for bree..
And like i said yesterday it's really weird to come to another house from people that we never saw her visiting to celebrate a birthday. Don't say that couldn't happen, but.. it's VH where weird things happen (and have 3 changes of clothes just for the birthday was also weird, now it's more understandable)