I think popcornbird has the smartest idea...well said..
I have BEEN the wicked stepmom..with an invitation to her father (who I am now divorced from) that said WITHOUT WIFE in huge letters on the invitation..and I never did a thing to her..she just didn't like me..she even told me it was nothing personal, it was the principle..whatever that meant! I think it was mainly because I had a son and she was jealous because my then husband paid so much attention to him, treating him as his own..

Anywho...certainly not defending her actions but do think popcornbird has a good heart to say all that.