Hi! I have a strange situation (well, it's not that strange, but I'm having trouble finding an answer.)
I'm inviting my aunt, uncle, and their three kids. They all live together, and all three kids are under 18. However, two of them (twins) will be 17 at the time of the reception. My family has usually invited older teenagers with a plus one - we have the space and budget so that's not a concern.
Their other child is 13. How do I word this invitation? Do I invite the 17 year olds separately with their own invitation, and put the 13 year old on his parents'?