I'm having a lot of trouble keeping my guest list within our budget. I heartbreakingly had to leave off some close friends from college but now my mother in law wants to add some of her relatives to this list. The problem is, even my fiance doesn't know his mom's cousins and their kids. She stated that some of these people RSVP'd to my fiances's sisters wedding, then didn't show. I cannot afford to have people no show at my wedding, while some of my close friends weren't able to be invited. I also can't give some of my friends a guest because I never met their significant other. Can I tell my mother in law "no"? My parents are footing most of the bill. My fiances mom offered to pay for the alcohol at the reception. Help!