Hiya,
I agree with msjulie5475. I think if you are really close to your dad or have a good relationship, it would be be nice for him to have his wife there.
It is your wedding day & honey you are getting married soon! Don't let anything get you down. You are marrying your true love & that is what is most important.
Although she hasn't extended an olive branch in the past by the sounds, taking the higher road & inviting her is a kind thing to do for your dad. You never know, she may come around eventually. I'm sure she is happy for you in her own way
No being a sad panda! Focus on you, your partner & your soon to be gorgeous day I hope you are both very happy & best wishes
MewKitty