Background : My sister is 10 years older than I am. She decided to tell her good friend that she liked him and they began dating. What stories she tells me, it seems like he just keeps her hidden meaning they don't go out publicly much. I met him once while visiting her.
She asked me about who I had invited and specifically answered it was family only because we can't afford to invite all our friends. She asked if I had an invitation for other people's spouses and I said yes. Comon sense thinking they have been in our family for years already. She asked if I had one for her and her boyfriend and I said no. She then said that she should be allowed to bring him since he is a "spouse" and that if money was an issue, she wanted to know how much per person and that she'd pay for him.
She's nearly 40 and I feel she is trying to show off that she has a boyfriend at my wedding to our family since I am the one getting married first. I told my FI but you know how men are, so nonchalant about things. This is bugging me and don't know what to do. If I do invite him, she'll be somewhat stealing my thunder because our family will be like, stunned! If he doesn't come, she'll be the one without a signifigant other like ususal.
Please, I need other perspectives, advice and comments!