My fiance has 6 adult nieces and nephews ranging in age from 16 to 24. i wasn't planning on inviting any of them with dates. I did however think it was appropriate to invite his nephew's girlfriend since they live together. I really went out of my way to make her feel like part of the family . I even included her in the family seating and processional because I didn't want to make her feel like she wasn't welcome. I however opened a can of worms because now my sister in law has contacted me and asked where the rest of the "dates" were going to be seated. We are already over our budget and guests that we contracted for. We literally have not a penny left in our budget to accomodate 5 more people(another 625 bucks)!!! These extra 5 guests are literally just "dates". I feel like these young adults just want to invite their friends to a free party at my expense. But I have expressed my opinion to my fiance and it has caused a huge argument and we are not even speaking because he thinks I'm not accepting of his family. I didn't even reply to my sister in law yet. HELP!! What to do? What to do?