One of my girlfriends recently got married about two days ago. She is planning on hosting a reception to celebrate her marriage in September.. actually quite close to my anniversary.
To the best of my knowledge, there will be no wedding traditions reanacted and I sincerely doubt she will be wearing a big poufy white wedding dress. Although, there may be wedding cake.
To me, I dont think this is that big of etiquette faux pas since she isnt pretending to not to be married and just wants to celebrate with friends and family.