Snodderly, that is exactly what I did...I erased the messages.
I am also struggling with something else. I was trying not to let it get to me but I feel like this person is not helping the sitch, my MIL.
It really bothers me that she did my H's dirty work for him by calling up his Grandmother and saying she needed to take back the invite. My MIL likes to say she just stays out of it but she doesn't at all. She is very 2 faced. I feel all she does is enable my H's childish behavior.
I think I am going to avoid my MIL at all costs from now on.