I’m sorry for your loss op 💐
I agree with post above ^^
I’m afraid it’s a good lesson in life being unfair and being the bigger person.
I don’t think writing a disingenuous text which is pretending to say “has there been a fall out?” when really you are saying “how come you didn’t invite my child when I invited yours?” Is not going to help resolve anything.
First because it’s so transparent. Second because it’s everyone’s prerogative to issue an invite or not to whomsoever they want, or not, and it’s extremely poor manners to either invite yourself or your child to something, or question not being invited retrospectively. And third you are probably not going to hear the truth even if the mother does respond.
Tell your child, “If others choose to be unkind then that’s for them to live with but we are not going to do that.”
And I would also explain that there are many other different reasons why someone may not be invited somewhere, the majority of which are nothing personal eg budgetary restraints.
Plus, once you have issued an invitation, it’s very poor form retract it, unless you retract it for everyone in the case of sudden ill health or something.
Your dd was happy to invite this girl a few weeks ago when you issued the invitation.
And what is more, this girl was happy to accept. Just focus on that and encourage the dc to have a good time. It’s a child’s party, you are not negotiating the Treaty of Versailles. Your dd will take your cue from you about this. And as she is in fact being very magnanimous then it shows you taught her extremely well! 😀