WHG: Looking for the shrinking cake

[workinghardguy]

Here is the last thread: WHG's last thread

I'm going to kick this thread off with an etiquette question... all thoughts are appreciated. My S is having a birthday get-together next weekend. He asked to invite two kids he used to go to daycare with. Their parents know my W and I in the way that parents who share a small daycare provider do. Though they know me much more than my W since I did most of the picking up and dropping off of our S.

I don't believe either set of parents know that my W and I have split up however. The parents have the option of dropping their kids off at my W's house and we'll take them to the party place and bring them back. Or the parents are welcome to come along. I don't know which option these parents will pick. I wouldn't call them friends but close acquaintances. I've been over their homes for birthday parties and taking my S to play. My W really hasn't so again, she doesn't know them as well.

I feel like I should at least warn them about our separation? But it also seems a little forward to just say "hey, by the way...".

Thoughts?