I made sure all the significant others of guests on my list were invited. Unfortunately, my fiance did not know that one of his co-workers had recently started dating someone. I only found out after invitations went out when I saw an Instagram post (about two weeks later). One of my bridesmaids also works with them and said she was unaware of the relationship until the same Instagram post. Normally I would just reach out, and invite the coworker to bring her SO and apologize, however, it turns out she had prior travel plans already scheduled and is unable to make it to the wedding.
Should I still reach out to apologize to the co-worker? I feel bad that I didn't include her SO, and I want her to know it wasn't a judgment on the status of their relationship.