DD who is 4 is going to be meeting her biological father's whole family over the next few weeks - we've agreed he will have her every other saturday - and during this time she will meet his partner, her 1/2 sister, step family, grandparents, aunts, uncles etc...
ex says he wants to ease her into it, and has suggested family party best way to do it 
can you tell me what to say to him (via email) what would be the gentlest way etc,
shes never been to his house and has said she doesnt want to go there as me and dd2 wont be there and shes scared that he will get cross with her??