Would this bug you

Your FGMIL tells you that it's one thing if people are family but you should not invite all your family that you are not close too. She was telling my guestlist is too high. My FI is one of three kids and on has an aunt with 2 kids and his grandparents and like five cousins in his close family. Meanwhile my mother is one of eight kids and I am close to all of my 27 cousins and my dad is one of seven and of coourse I am inviting my aunts and uncles but I am only inviting the cousin's I speak to which in this case is one. I feel why am I justifying this list to you when you are not contributing a dime nor did I ask you too or ask for your opinion. I of course could not go off on my FGMIL like that. How dear she presume who I am close to? Yes we are paying for everything and have not asked for nor been offered a dime.