My fiance's sister just got married back in June. We both met the groom's parents then. We're finishing up our guest list and my fiance and his mother want to invite his sister's new in laws. We already decided that, to keep within our budget, we're going to keep the guest list as small as possible -- very close family and friends, that's it. We want only about 80 people there but our guest list is already past 110. Personally, I don't know them from John, they mean nothing to me and so I don't want to invite them. My fiance says that doesn't make sense. It's getting very frustrating because we're both being very firm about it. We've both been very in control over the wedding, no one has made decisions without the other, so it's not like its only what I say goes. I feel like giving in and just inviting them because I don't want to cause an argument. But then at the exact same time, I really don't want them there. Any opinions?!