My father passed away a few days ago and my sister is flying in from Canada with her family to attend the funeral. She has a 3 year old and a 4 month old. She wants to bring them to the funeral because she says everyone she would trust to babysit will be at the funeral and she doesn't want to leave her 3 year old with someone he hasn't spent much time with. I'm there to mourn my father and don't want the kids getting fussy and my sister getting stressed because they're fussy and then me having to help her look after them. My kids (5 and 7) will not be going and I don't think hers should either. She was quite upset and I'm not sure if I'm being unreasonable. Any opinions?