Arranged to have MIL and FIL, Mum, Dad, Sister and BIL for Christmas dinner at 2pm. Mum dad sister and I always exchange presents in the morning so expected them to arrive at 11 ish to give time to do so. MIL and FIL arrive at 12.30 - not a problem. However , expected my mum and dad and sister to arrive about 10.30 - 11 as they usually get more presents for our children which takes a long time plus MIL doesn't buy that much as has loads of grandkids to buy for where my mum only has 2. Don't want them to feel bad for giving less so hoped mum would get there first to give presents before MIL. As lunch planned for 2pm, we were in kitchen cooking from 1 and my mum and dad arrived at 1:30.Sister and BIL nowhere to be seen. turns out sister had been to mums at 1.00 to exchange presents together. she had arranged to go at 10am but overslept thus getting to my mums way later than expected. Annoyed with mum for not saying "well that's too bad but if you are late that's your fault I'm going to other daughters as planned to spend more time with grandkids instead of hanging around waiting for you...." I would not be so annoyed about this but our 2 DD had been sitting by the front window since 10am waiting for nanny and grandad to arrive. Upsetting really. As lunch needed lots of cooking attention When they finally arrived, DH and I had to stay in kitchen cooking so missed mum and dad giving our kids their presents. Sorry for rant, just annoyed.......😡