My fiancé is a father of 6.
Two of his sons over 18 live together in a house.
Four are still living with him. One of the four is over 18.
I know anyone over 18 gets an invitation.
In our case, what do you think?
Should we send one invitation to the two that live together and one for the ones that live at home?
How should we address the envelopes?
Envelope 1: Mr. XX1 and Mr. XX2
Envelope 2: Mr. XX3 and Mr. XX4 and Mr. XX5 and Mr. XX6?