I am genuinely interested in how families roll with this.
If your child/sibling invited you to their house, not necessarily for an occasion but a Bank Holiday or around Christmas or Easter do you just simply accept or decline?
Or would you say for example Granny will be with us.
Or can I bring my partner?
Or can my partner bring their child?
Or simply ring asking if they can help with something/bring something?
Remember this is your child/sibling so someone you are close to.