More of a What Would You Do, than AIBU but posting for traffic really
I am having a joint party for my twin DDs in October (turning 3). They joined a new nursery a couple of months ago and have started to make friends (are mentioning a few names that I recognise from the list of kids in their room). Currently the 2 names mentioned have only been from one of my DDs and we encourage individual friendships so, as it stands (I won't do invites til nearer the date) I will be sending these children an invite from just this one DD. As I won't know the parents (but they may well know she's a twin) I don't want to them to feel obliged to do cards/gifts for both of my DDs or be put off going because they feel obliged IYSWIM.
What would be the ideal thing to do or to write on these invites to avoid this - any ideas? I don't want to seem presumptuous or sound formal and now I've wound it up into my head to be a much bigger issue than it really is!!