Co-worker dilemma

Sorry this is a long one. So the situation goes I don't have a lot of family and my closest friends live 4-4.5 hours away. I understand with life and such a bunch of people I care for may not be able to make it to our wedding. So my guests list consists of a lot of my co-workers. We are nurses and we are each others support systems for work and life situations. The co workers I invited are people I confide in, laugh with, and enjoy their company. I never bring up any wedding planning or discussions unless someone asks me. There is one particular person that I find a bit overwhelming and she keeps trying to worm her way into an invite. She has offered on two seperate occasions to do the girls and my make up because she sells mary kay. I politely declined stating we already have hair and make up artists.
I absolutely don't want this person to come and never had any interest in inviting her. Well recently another co worker/friend was discussing her invite in front of this person and that not invited co worker complained about me for two hours. She became very upset and loud I heard. She stated that it is rude and nasty of me to invite some people and not others and I should invite the whole department, etc etc. I wasn't there and heard about it from the invited co worker who was so apologetic and upset. Now I'm dreading running into this person. This same person once confronted a co worker who was in the hospital having a stroke for not inviting her to a Christmas party. I'm at loss what to say. I feel.like I can't say it is just a small wedding or just family and friends because there is a big number of them coming. Please help 😦