SIl has picked her sister's 2 girls (age 9 & 11) and left out my DD (age 5).
When we get to the wedding in August, my DD will be upset - her cousins are the only other girls she will know at the wedding, and I feel sorry that she wasn't included.
I know that its SIL's day, and all that - but she has been so relaxed about all the planning etc, and not a bit Bridezilla.