Hello, I am looking for some advice on how to address wedding invitations. Specifically, my fiancé's sister has 2 nieces and a nephew. Niece A does not live at home and I think niece B lives at home during the summer since she is in college. I want to invite both nieces and the nephew since I have met them all and they are my fiancé's only nieces/nephew by blood. However, I do not have niece A's address. I know she lives in an apartment in the same town as her mom. My fiancé does not get along with his sister that well so it is a chore for him to call his sister and ask this.. Also I don't have her phone number and it would probably be weird if I call or text her.
I am thinking to put my fiancé's sister, niece B and nephew on the envelope of one wedding invitation. And just order the invitations but not print niece A's address yet. I know niece B and the nephew should get their own invitations if they are over 18. On the other hand, it may look odd to have three names on separate lines on one envelope. My fiancé just wants to mail all the invites to his sister's address (for his mother who is in a nursing home so that may make sense, and niece A). We don't know if any of these people will come since they live far away and have responsibilities at home and don't have a ton of money to spend on flights. But I'd like to invite them in a way that doesn't look tacky or disrespectful.
Thanks for any suggestions or input in advance.
