I'm addressing my save-the dates (destination wedding) and have a question about how to invite my stepmom, who has been in my life since I was 4. She and I haven't always been close, however in the past 3-4 years that has changed significantly. She even went with me to my first dress shopping appointment. My relationship with my father (from whom she separated ~3 months ago) is extremely strained and we're lucky if we speak more than 3 times per year.
However, my stepmom has been living with her new boyfriend since the separation. Since she and my father aren't legally separated and no one else in my dad's family knows about this separation, does she still get invited with her new boyfriend? What exactly is the "social unit" here? Can I just send a save-the-date addressed to her at her boyfriend's home, and worry about the "and guest" later? I don't anticipate that her BF would travel 2000 miles to attend my wedding anyway, so should I just send it to both as a courtesy? Because of my relationship with my dad, I'm not necessarily worried about hurting his feelings but I don't want to make anyone else in the family uncomfortable.
