last minute wedding with unnecessary drama

my fiance and I got engaged in November and just found out were pregnant, we planned to go to the courthouse in secret (besides our parents of course) and then continue on with our wedding in July as planned, alleviating alot of the paperwork and being able to get insurance. we only wanted our parents and witnesses to know and our parents weren't available to come. my fiances friend is very close to him they served a tour together and they have been friends ever since. his wife, however, is not the best (to make a long story short). She was supposed to be working when her husband came with us, but he decidedly invite her unbeknownst to us. I had a feeling he would do this so I asked my fiance to message him about if he would ride with us or not and that's when he said he was bringing his wife. I told my fiance that I do not want her there at all, and he can word it however he likes, but if I see her there, she will be sitting outside (he doesn't like her either). this is the first time I've felt like a bitchy wife and i feel bad about it and apologized (without blaming the hormones 😅). but I don't feel bad about not wanting her to be there. should I feel bad about that? I should also add that my fiance and I went to their marriage (also courthouse) because they needed someone and it's his friend, and her and I had just met so I had no problem with her. I don't want to feel awful because we were at theirs and I don't want her at mine.