congratulations alera, glad that you dad will be coming with you, i do understand how you feel about your mom not being there, but is there a way that you can invite her, just because, but let her find her own way there? maybe you can tell her that you are not gonna be able to take her with you and that you would appreciate that if she somehow were to go, that you would hope that you would have to go through any drama, by it being your day. who knows maybe she'll understand.
like i said, i do understand how you feel, but i think that if i was your mom, then i'd be very hurt, but i know that its not about how your mom feels, its about how you feel on your day, and you do have a right to feel that way.
this is such an important day for you, and i honesty do know how you feel. sorry that you have to make such a hard decision. still praying for ya